Religion and violence

I was talking to a Moslem believer, that is a religious person who believes all she is told about her faith, who commented that unlike other religions (sic) Islam was received in one flow. While of course the Koran says that Muhammad received his messages intermittantly the discription of fauna and flora does not fit in with Sauda Arabia, suggesting it was written down in different times and places. The woman believer believes that if it did come from one flowing exposition it is superior to Christianity which is subject to inclusions from other hands. Media rather than message perhaps? I pointed out to her that Islam condones violence, and for that reason it is inferior to Christianity.

Why are many young men such eager converts to Islam? Perhaps because it provides validation to violent inclinations?