re ISIS: Sometimes turning the other cheek is not an option.

[Yorktown]

32. Sorry, but I can prove you wrong on all three counts

(1) terrorism taught in mosques? Proof on demand. First google hit:

AK-47 training held at London mosque
British Islamic extremists have been involved in weapons training with assault rifles at a mosque in London, intelligence sources have told The Observer.
The disclosures that hardline Islamists practised with Kalashnikov AK-47s at the Finsbury Park mosque in north London underline the pivotal role that Britain has played in the recruitment of volunteers to fight alongside Osama bin Laden's al-Qaeda group all over the world. http://www.theguardian.com/uk/2002/feb/17/terrorism.religion

And it wouldn't be too difficult to find youtubes of cheiks preaching hate.

(2) The Quran never having changed? Even the hadiths say so
(the surah-eating goat, the verses forgotten because its reciters all died at the same battle, the surah which resembled another but in a harsher version and was lost, it's all in sahih muslim)
And the fact 99% of Muslims worldwide think the Quran never changed is testament to the fact they do not dare contest the one sentence in the Quran itself which says it was never changed even when muhamad kept inventing other surahs after that one saying the Quran never changed. We have different Qurans. One guy wrote a whole book on the subject. here, one webpage with a long list of different versions of the Quran in existence: http://answering-islam.org/Green/seven.htm

(3) the Crusades attempting to wipe out Islam? Find me a reputable book saying so.
But Tamerlan (Timur) did attempt to eradicate all people in his path who refused to convert to Islam.