Again and again, when Westerners are perceived as denigrating Muhammad, the Koran, or Islam, Islamists demonstrate, riot or kill.

My career divides in two: before and after 9/11. In the first part I was trying to show that Islam is relevant to political concerns. If you want to understand Muslims, I argued, you need to understand the role of Islam in their lives. Now that seems obvious.

Ultimately, there is no compromise. Westerners will either retain their civilization, including the right to insult and blaspheme, or not.

Any Westerner can now buy a Koran for a dollar and burn it, while any Muslim with a platform can transform that act into a fighting offense. As passions rise on both sides of the divide, Western provocateurs and Islamist hotheads have found each other, as confrontations occur with increasing frequency.

The Koran is a not 'a product of Muhammad or even of Arabia,' but a collection of earlier Judeo-Christian liturgical materials stitched together to meet the needs of a later age...A few scholars go even further, doubting even the existence of Muhammad.

To me, every fundamentalist Muslim, no matter how peaceable in his own behavior, is part of a murderous movement and is thus, in some fashion, a foot soldier in the war that bin Laden has launched against civilization.

All immigrants bring exotic customs and attitudes, but Muslim customs are more troublesome than most.