Holy Koran! Sura 13 or 'Thunder' – 37 % preaches violence....

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And indeed We sent Messengers before you (O Muhammad SAW), and made for them wives and offspring. And it was not for a Messenger to bring a sign except by Allah's Leave. (For) each and every matter there is a Decree (from Allah).

013:039
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Allah blots out what He wills and confirms (what He wills). And with Him is the Mother of the Book (Al-Lauh Al-Mahfuz)

013:026
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Allah increases the provision for whom He wills, and straitens (it for whom He wills), and they rejoice in the life of the world, whereas the life of this world as compared with the Hereafter is but a brief passing enjoyment.

013:040
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Whether We show you (O Muhammad SAW) part of what We have promised them or cause you to die, your duty is only to convey (the Message) and on Us is the reckoning.

013:034
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For them is a torment in the life of this world, and certainly, harder is the torment of the Hereafter. And they have no protector against Allah.

013:005
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And if you (O Muhammad SAW) wonder (at these polytheists who deny your message of Islamic Monotheism and have taken besides Allah others for worship who can neither harm nor benefit), then wondrous is their saying: "When we are dust, shall we indeed then be (raised) in a new creation?" They are those who disbelieve in their Lord! They are those who will have iron chains tying their hands to their necks. They will be dwellers of the Fire to abide therein.

013:006
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They ask you to hasten the evil before the good, yet (many) exemplary punishments have indeed occurred before them. But verily, your Lord is full of Forgiveness for mankind inspite of their wrong-doing. And verily, your Lord is (also) Severe in punishment.

013:011
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For each (person), there are angels in succession, before and behind him. They guard him by the Command of Allah. Verily! Allah will not change the good condition of a people as long as they do not change their state of goodness themselves (by committing sins and by being ungrateful and disobedient to Allah). But when Allah wills a people's punishment, there can be no turning back of it, and they will find besides Him no protector.

013:018
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For those who answered their Lord's Call [believed in the Oneness of Allah and followed His Messenger Muhammad SAW i.e. Islamic Monotheism] is Al-Husna (i.e. Paradise). But those who answered not His Call (disbelieved in the Oneness of Allah and followed not His Messenger Muhammad SAW), if they had all that is in the earth together with its like, they would offer it in order to save themselves (from the torment, it will be in vain). For them there will be the terrible reckoning. Their dwelling place will be Hell; - and worst indeed is that place for rest.

013:019
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Shall he then who knows that what has been revealed unto you (O Muhammad SAW) from your Lord is the truth be like him who is blind? But it is only the men of understanding that pay heed.

013:025
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And those who break the Covenant of Allah, after its ratification, and sever that which Allah has commanded to be joined (i.e. they sever the bond of kinship and are not good to their relatives), and work mischief in the land, on them is the curse (i.e. they will be far away from Allah's Mercy); And for them is the unhappy (evil) home (i.e. Hell).

013:031
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And if there had been a Qur'an with which mountains could be moved (from their places), or the earth could be cloven asunder, or the dead could be made to speak (it would not have been other than this Qur'an). But the decision of all things is certainly with Allah. Have not then those who believe yet known that had Allah willed, He could have guided all mankind? And a disaster will not cease to strike those who disbelieve because of their (evil) deeds or it (i.e. the disaster) settle close to their homes, until the Promise of Allah comes to pass. Certainly, Allah does not fail in His Promise.

013:032
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And indeed (many) Messengers were mocked at before you (O Muhammad SAW), but I granted respite to those who disbelieved, and finally I punished them. Then how (terrible) was My Punishment!

013:033
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Is then He (Allah) Who takes charge (guards, maintains, provides, etc.) of every person and knows all that he has earned (like any other deities who know nothing)? Yet they ascribe partners to Allah. Say: "Name them! Is it that you will inform Him of something He knows not in the earth or is it (just) a show of false words." Nay! To those who disbelieve, their plotting is made fairseeming, and they have been hindered from the Right Path, and whom Allah sends astray, for him, there is no guide.

013:035
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The description of the Paradise which the Muttaqun (pious - see V.2:2): have been promised! -Underneath it rivers flow, its provision is eternal and so is its shade, this is the end (final destination) of the Muttaqun (pious - see V.2:2), and the end (final destination) of the disbelievers is Fire. (See Verse 47:15)

013:041
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See they not that We gradually reduce the land (of disbelievers, by giving it to the believers, in war victories) from its outlying borders. And Allah judges, there is none to put back His Judgement and He is Swift at reckoning.

013:042
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And verily, those before them did devise plots, but all planning is Allah's. He knows what every person earns, and the disbelievers will know who gets the good end (final destination).