I agree with Asterion: you start with an assumption that Islam is violent, and the ask why this is the case. It would be like asking a man, "When did you stop beating your wife?" or a child asking, "Why are all dogs brown?" particularly if the child had only seen brown dogs. . . I'm guessing that you don't personally know any Muslims, and that you don't understand that there are three main branches of Islam, just as there are three main branches of Christianity. The Wahhabi branch, also know as the Salafis, who are our oil allies in Saudi Arabia, practice "fundamentalist" Islam. But nowhere is it acceptable to mainstream Islam to practice acts of violence against innocents. . . Further, in the Old and New Testaments of the Bible, there are heartwarming passages in Psalms about dashing out the brains of the infants of the conquered, in Leviticus about stoning women to death, even in Matthew, Mark, Luke, and John about carrying out the death penalty against political prisoners, but not many people hold these instances up and say, "Christianity is violent." . . Tribal customs are violent. Sexism encourages violence. Human beings are sinful and fall short of perfection. Islam is not inherently violent.