Many apologists will often take another next ignorant step. They commit the tu quoque fallacy by comparing the Quran to the Bible. As an atheist, I can ignore the fallacy and see the violence in both books as abhorrent.
For the sake of argument, they are both violent - The Bible has 871 verses of cruelty and violence while the Quran has 512, but, since the Quran is much shorter, you can see that the Quran has about 3 X as violent percentage-wise: 8.2% vs. 2.8%. We can take this one step further, in light of abrogation, and realize that the Quran is much more than 3 times as violent. Unfortunately, there is more. If we add in verses that may not direct violence, but demonstrate hatred or viciousness towards unbelievers, the Quran shows its true ugly self:
By far the greatest portion, however, over 60% of the text of the Koran, is devoted to polemics against unbelievers, justifications for placing them in submission or killing them, on rewards for those who believe in Allah (especially for those who war against unbelievers), and punishment for unbelievers on earth and in the hereafter.However, counting verses is not enough. There is more.
It is important to understand the differences between Islam and the other two Abrahamic religions. These differences explain why the Quran's violent words are much more dangerous:
1. Muslims consider the Quran to be the word of Allah, NOT the inspired word of Allah. Thus the Quran is considered perfect in the eyes of Muslims. No mistakes. Thus, there is no doubt on what to do when it says "beat your wife" if you fear disloyalty or "slay the unbeliever wherever you find them."
2. The Quran's words are considered timeless and universal, regardless of the context from which they came.
3. Islam is considered more than just a religion. It is considered a prescriptive guide to life, law, politics, warfare,...many have called Islam a "political religion" or even a socio-political system with religion as just an element.
Now, these points together, you have a violent, racist, misogynist guide to life that is timeless, universal and infallible. At this point, it pays to just list some of these horrible verses in the guide:
Fight in the cause of Allah those who fight you, but do not transgress limits, for Allah does not love transgressors. 2:190
And slay them wherever you catch them, and turn them out from where they have turned you out, for tumult and oppression are worse than slaughter. 2:191
And fight them on until there is no more tumult or oppression, and let there prevail justice and faith in Allah; but if they cease, let there be no hostility except to those who practice oppression. 2:193
Fighting is prescribed for you, and you dislike it. But it is possible that you dislike a thing which is good for you, and that you love a thing which is bad for you. But Allah knows, and you know not. 2:216
Let those fight in the cause of Allah who sell the life of this world for the Hereafter. To him who fights in the cause of Allah, - whether he is slain or gets victory – soon shall We give him a reward of great value. 4:74
Of the Unbelievers: "seize them and slay them wherever you find them: and in any case take no friends or helpers from their ranks." 4:89
Allah has granted a grade higher to those who strive and fight with their goods and persons than to those who sit at home. 4:95
…"for the Unbelievers are open enemies to you." 4:101
For the Unbelievers, Allah has prepared a humiliating punishment. 4:102
O People of the Book! Commit no excesses in your religion: nor say of Allah anything but the truth. Christ Jesus the son of Mary was no more than a Messenger of Allah… Do not say "Trinity": desist: it will be better for you: for Allah is One God: Glory be to Him: far exalted is He above having a son. 4:171
From those too, who call themselves Christians, We did take a covenant, but they forgot a good part of the Message that was sent to them: so We estranged them, with enmity and hatred between one and the other, to the Day of Judgment. And soon will Allah show them what they have done. 5:14
In blasphemy indeed are those that say that God is Christ the son of Mary. 5:17
O you who believe! Take not the Jews and the Christians for your friends and protectors: they are but friends and protectors to each other. And he among you that turns to them for friendship is of them. 5:51
They do blaspheme who say: "God is Christ the son of Mary." They do blaspheme who say: God is one of three in a trinity: for there is no God except one God Allah. If they do not desist from their word of blasphemy, verily a grievous penalty will befall the blasphemers among them. Christ the son of Mary was no more than a Messenger; many were the Messengers that passed away before him. 5:72- 73, 5:75
Of the Jews: ‘When in their insolence they transgressed all prohibitions, We said to them: "Be you apes, despised and rejected."’ 7:166
"Many are the men We have made for Hell…" 7:179
Remember your Lord inspired the angels with the message: "I am with you: give firmness to the Believers: I will instill terror into the hearts of the Unbelievers: you smite them above their necks and smite all their finger-tips off them." 8:12
Against them make ready your strength to the utmost of your power, including steeds of war, to strike terror into the hearts of the enemies of Allah. Whatever you spend in the cause of Allah shall be repaid to you and you shall not be treated unjustly. 8:60
O Messenger! Rouse the Believers among you to the fight. If there are twenty amongst you, patient and persevering, they will vanquish two hundred: if a hundred, they will vanquish two thousand of the Unbelievers: for these are people without understanding. 8:65
…Then fight and slay the Pagans wherever you find them, seize them, beleaguer them, and lie in wait for them in every stratagem of war…9:5
Fight them and Allah will punish them by your hands, cover them with shame, help you to victory over them, heal the breasts of the Believers. 9:14
Fight those who do not believe in Allah … until they pay the Jizya with willing submission and feel themselves subdued. 9:29
… Allah will send His punishment from Himself or by our hands. 9:52
Therefore, when you meet the Unbelievers in fight, smite at their necks; at length, when you have thoroughly subdued them, bind a bond firmly on them… He lets you fight in order to test you, some with others. But those who are slain in the way of Allah, - He will never let their deeds be lost. 47:4
It is He Who got out the Unbelievers among the People of the Book from their homes at the first gathering of the forces. Little did you think that they would get out: and they thought that their fortresses would defend them from Allah! But the wrath of Allah came to them from quarters from which they had little expected it, and cast terror into their hearts, so that they destroyed their own dwellings by their own hands and the hands of the Believers. 59:2
That is because they resisted Allah and His Messenger: and if any one resists Allah, verily Allah is severe in punishment. Whether you cut down O you Muslims the tender palm-trees, or if you left them standing on their roots, it was by leave of Allah, and in order that He might cover with shame the rebellious transgressors. 59:4,5
They will not fight you even together, except in fortified townships, or from behind walls. Strong is their fighting spirit amongst themselves: you would think they are united, but their hearts are divided: that is because they are a people devoid of wisdom. 59:14
Truly Allah loves those who fight in His Cause in battle array, as if they were a solid cemented structure. 61:4
More verses (with some repeats) that inspire hatred:
On Jews and Other "Disbelievers"
[Christians, Pagans, and Jews are all castigated as unbelievers, but the Koran's main thrust is against Jews. Unbelievers in Muhammad as a prophet of God and in the Koran as God's word, are depicted not only as infidels, but are reviled as vile liars and deceivers. The theme permeating the Koran is typified by the following verse]:
5.78.. Those of the children of Israel who disbelieved were cursed by the tongue of David and Jesus the son of Mary;... Evil is that which they did... Evil is that which their souls have sent before them, for God's wrath is on them, and in the torment shall they dwell for aye. But had they believed in God and the Prophet, and what was revealed to him, they had not taken these for their patrons; but many of them are evildoers.
[This theme is presented in the Koran over and over again. The contexts change, but the message remains the same. The precepts presented, one must emphasize, are to be taken as the lessons that Allah himself commands to be believed as the means to avoid being boiled in Hell.
2.92. Did not Moses came to you with clear proofs, and yet you worshiped the calf after he left, and you were polytheists and wrong-doers.
2.96. Verily, you will find the Jews the greediest of mankind for life and even greedier than those who ascribe partners [other gods] to Allah.
2.100. Is it not [the case] that every time they make a covenant, some party among them throw it aside? Nay! the truth is most of them believe not.
2.124. And when his Lord tried Abraham with certain words, he fulfilled them. He [Allah] said: "Surely I will make you an Imam of men" . Abraham said: :And [what] of my offspring?" My covenant does not include the unjust, said He [Allah].
3.75. Among the people of the Scripture [Jews and Christians] is he who, if entrusted with a Cantar [a great amount of wealth, etc.], will readily pay it back; and among them there is he who, if entrusted with a single silver coin, will not repay it unless you constantly stand demanding, because they say: "There is no blame on us to betray and take the properties of the illiterates [Arabs]." But they tell a lie against Allah while they know it.
3.78. Among them are those who distort the Book with their tongues, so that you may think it is from the Book, but it is not from the Book. They say: "This is from Allah," but it is not from Allah. They speak a lie against Allah while they know it. Do not make friends of those outside your religion, since they will not fail to do their best to corrupt you. They desire to harm you severely. Hatred has already appeared from their mouths, but what their breasts conceal is far worse...
3.119. Lo! You are the ones who love them but they love you not, and you believe in all the Scriptures while they disbelieve in your Book [Koran]. And when they meet you, they say, "We believe". But when they are alone, they bite the tips of their fingers at you in rage. Say [to them]: "Perish in your rage."
3.120. If a good befalls you, it grieves them, but if some evil overtakes you, they rejoice at it. But if you remain patient and become Al-Muttaqûûn (the pious), not the least harm will their cunning do to you.
4.161. And their taking usury though indeed they were forbidden it and their devouring the property of people falsely, and We have prepared for the unbelievers from among them a painful chastisement.
4.156. And because of their [the Jew's] disbelief and uttering against Mary a grave false charge [that she has committed illegal sexual intercourse].
4.157. And because of their saying [in boast], "We killed Messiah Jesus, son of Mary, the Messenger of Allah," - but they killed him not, nor crucified him, but the resemblance of Jesus was put over another man... For surely; they killed him, not Jesus son of Mary.
4.159. And there is none of the people of the Scripture (Jews and Christians), but must believe in him, son of Mary as only a Messenger of Allah and a human being... And on the Day of Resurrection, he [Jesus] will be a witness against them.
4.161. And their taking of Ribââ [usury] though they were forbidden from taking it and their devouring of men's substance wrongfully [bribery, etc.]. And We have prepared for the disbelievers among them a painful torment
4.50. Look, how they invent a lie against Allah...
4.52. They are those whom Allah has cursed, and he whom Allah curses, you will not find for him any helper.
5.51. O you who believe! Do not take the Jews and Christians for friends; they are but friends of one another; and whoever among you takes them for a friend, then surely he is one of them.
5.58. And when you call to prayer they make it a mockery and a joke, because they are a people who will not understand.
5.60. ...Those Jews who incurred the Curse of Allah and His Wrath, some of whom He has transformed into monkeys and swine...
5.62. You see many of them [Jews] hurrying for sin and transgression, and doing illegal things [bribes and usury]. Evil indeed is that which they have been doing.
5.63. Why do not the rabbis and the doctors of law prohibit them from their speaking of what is sinful and their consuming what is unlawfully acquired? Certainly evil is that which they work...
5.66. ...As for most of them, evil is what they do.
7.40. ...The doors of heaven shall not be opened for them, nor shall they enter the garden until the camel pass through the eye of the needle.
7.41. They shall have a bed of hell-fire... thus do We reward the unjust.
8.55. Surely the vilest of animals in Allah's sight are those who disbelieve.
8.56. Those with whom you make an agreement, then they break their agreement every time...
62.5. The likeness of those who were charged with the Torah, then they did not observe it, is as the likeness of the ass bearing books, evil is the likeness of the people who reject the communications of Allah.
[Many references to Jesus appear in the Koran. The Gospel is accepted as a holy book to be followed, and Jesus is cited as a prophet, but Jesus's divinity is denied]:
23.91. Never did Allah take to Himself a son, and never was there with him any (other) god -- in that case would each god have certainly taken away what he created, and some of them would certainly have overpowered others; glory be to Allah above what they describe!
[Slaughtering unbelievers is authorized with some nominal"limits." Killing unbelievers becomes an obligation under many circumstances. Unbelievers are to be spared if they become subject to believers, and pay an obligatory tax].
2.190. Fight in the Way of Allah those who fight you, but transgress not the limits.
2.191. And kill them wherever you find them, and turn them out from where they have turned you out. And Al-Fitnah [disbelief and worshiping of other gods along with Allah) is worse than killing.
2.193. And fight them until there is no more Fitnah and worship is only for Allah..
2.216. Jihad (holy fighting in Allah's Cause) is ordained for you, though you dislike it, and it may be that you dislike a thing which is good for you and that you like a thing which is bad for you.
2.243. Did you [O Muhammad] not think of those who went forth from their homes in thousands, fearing death? Allah said to them, "Die!" Then He restored them to life.
3.12. Say [O Muhammad] to those who disbelieve: "You will be defeated and gathered together to Hell, and worst indeed is that place to rest."
[The following passages refer to two battles against Jewish communities, one at Badr, in which the Islamic forces were victorious, and the other at Uhud, in which they were defeated]:
3.13. There has already been a sign for you, O Jews, in the two armies that met [at Badr]: One fought in the Cause of Allah; the others were disbelievers. The believers saw the disbelievers with their own eyes [as] twice their number, although they were thrice their number.
3.139. So do not become weak against your enemy, nor be sad, and you will be victorious if you are indeed believers.
3.141. So does Allah test [or purify] the believers [from sins] and destroy the disbelievers.
3.142. Do you think that you will enter Paradise before Allah tests those of you who fought [in His Cause]?
3.143. You wished for martyrdom before you met it. Now you have seen it openly with your own eyes.
[The Koran then turns to the battle of Uhud. The exhortations are rationalizations of the ignominious defeat of the Muslim forces]:
3.155. Those of you who turned back on the day the two hosts met, it was Shaitâân [Satan] who caused them to backslide[run away from the battlefield] because of some [sins] they had earned. But Allah, indeed, has forgiven them.
3.156. O you who believe! Be not like those who disbelieve and who say to their brethren when they go out to fight: "If they had stayed with us, they would not have died..." It is Allah that gives life and causes death.
3.157. And if you are killed or die in the Way of Allah, forgiveness and mercy from Allah are far better than all that they amass [of worldly wealth, etc.].
3.158. And whether you die or you are slain, verily to Allah shall you be gathered.
3.166. And what befell you on the day when the two armies met was with Allah's knowledge, that He might know the believers.
3.167. And that He might know the hypocrites. It was said to them: Come, fight in Allah's way, or defend yourselves. They said: "If we knew fighting, we would certainly have followed you." They were on that day much nearer to unbelief than to belief. They said with their mouths what is not in their hearts, and Allah best knows what they conceal.
3.168. Those who said of their brethren whilst they [themselves] held back: "Had they obeyed us, they would not have been killed." Say [to them]: "Then avert death from yourselves if you speak the truth."
3.169. Think not of those who are killed in Allah's way as dead. Nay, they are alive with their Lord are provided sustenance from their Lord.
3.170. They rejoice in what Allah has bestowed upon them of His Bounty, rejoicing for those who have not yet joined them, but are left behind [not yet martyred] that on them no fear shall come, nor shall they grieve.
3.172. Those who answered [the Call of] Allah and the Messenger after being wounded; for those of them who did good deeds and feared Allah, there is a great reward
4.74. Therefore let those who would trade this world's life for the Hereafter fight in the cause of Allah.. Whoever fights in the way of Allah, be he slain or be he victorious, We shall grant him a mighty reward.
4.75. . What reason have you for not fighting in the cause of Allah and of the weak among the men and the women and the children..
4.76. Those who believe, fight in the Cause of Allah, and those who disbelieve fight in the cause of Satan. Fight therefore against the friends of the Satan; surely the strategy of the Satan is weak.
4.89. They desire that you should disbelieve as they have disbelieved, so that you might be like them; therefore take not from among them friends until they fly [follow] in Allah's way. But if they turn back [to disbelief], then seize them and kill them wherever you find them, and take not from among them a friend or a helper.
4.91. You will find [those hypocrites] who would like to be safe from you and [also] secure from their own people. As often as they are sent back to the mischief they get thrown into it headlong. Therefore, if they do not withdraw from you, offer you peace, and restrain their hands, then seize them and kill them wherever you find them; against these We have given you a clear authority.
8.17. You did not slay them, it was Allah Who slew them, and you did not smite when you smote [the enemy], but it was Allah Who smote, and that He might confer upon the believers a good gift from Himself.
8.41. And know that whatever of war-booty that you may gain, verily one-fifth of it is assigned to Allah, and to the Messenger [Muhammad], and to the near relatives [and also] the orphans, the poor, and the wayfarer...
8.57. Therefore if you gain the mastery of them in war, then punish them severely in order to disperse those who are in their rear, that they may learn a lesson.
8.65. O Prophet! urge the believers to war; if there are twenty steadfast ones of you they shall overcome two hundred, and if there are a hundred steadfast of you they shall overcome a thousand of those who disbelieve, because they are a people who do not understand.
8.66. Now Allah has lightened your burden, for He knows that there is weakness in you. So if there are a hundred steadfast of you they shall overcome two hundred, and if there are a thousand they shall overcome two thousand by Allah's permission
8.67. It is not fit for a prophet that he should take captives unless he has fought and triumphed in the land; you desire the frail goods of this world, while Allah desires [for you] the hereafter.
8.69. So enjoy the booty you have gained in war, lawful and good, and be afraid of Allah.
9.5. So when the sacred months have passed, slay the idolaters wherever you find them, and take them captives and besiege them and lie in wait for them in every ambush. But if they repent and perform prayer and pay the poor-rate, leave their way free to them.
9.13. What! will you not fight a people who broke their oaths and aimed at the expulsion of the Apostle, and they attacked you first; do you fear them? But Allah is most deserving that you should fear Him, if you are believers.
9.14. Fight them so that Allah will punish them by your hands and bring them to disgrace, and bring you victory over them, and heal the hearts of a believing people.
9.29. Fight those who do not believe in Allah, nor in the Last Day, nor do they prohibit what Allah and His Apostle have prohibited, nor follow the religion of truth, out of those who have been given the Book, until they pay the tax in acknowledgment of superiority and they are in a state of subjection.
Women in the Koran
2.223. Your wives are a tilth [fertile ground or "receptacle for your seed"] for you, so go into your tilth when you like, and do good beforehand for yourselves, and be careful (of your duty) to Allah, and know that you will meet Him, and give good news to the believers.
4.34. Men are the protectors and maintainers of women because Allah has made some to excel others and because they spend out of their property. Good women are therefore devoutly obedient, guarding their chastity and their husband's property. Those [women] on whose part you fear disobedience, first admonish them, then refuse to share their bed, and last, beat them. Then if they obey you, do not seek a way against them.
22.31. Say to the believing women that they cast down their eyes and guard their private parts and do not display their ornaments; let them wear their head-coverings over their bosoms, and not display their ornaments except to their husbands or their fathers, or the fathers of their husbands, or their sons, or the sons of their husbands, or their brothers, or their brothers' sons, or their sisters' sons, or their women, or those whom their right hands possess, or male servants not having need [of women], or the children who have not attained knowledge of what is hidden of women; and let them not strike their feet so that what they hide of their ornaments may be known--------------------------------
I know I've missed a lot, even for the Quran. Also, the violence continues in a much more prescriptive way in the Had, and there is a lot more prescriptive violence in the Hadith for those interested. Here are some links to lists of vicious Quran and Hadith passages: