I'm athest too, for that matter, and have nothing at all against the Islam. That wasn't my point.
Thing is that many people have a narrow view of the Islam (seeing it as totalitarian and fundamentalist) perhaps in the same way as we view Medieval society. After all, historic sources are written by and for the important folks, so they often give a wrong image of what peasants said or thought. Also, I believe, many nobles weren't fundamental because of their faith, but because they saw the political advantages of zeal.