Well I agree with you in principle, but lets take a look at which religion just blew up a bunch of children at a concert based on the beliefs garnered from their holy book and try to get some real-world perspective on who is the worst threat right now.
EDIT: Besides, how can someone seriously believe in the teachings of a holy book from which they've had to pick their own parts to believe in because the other bits are evil? The whole concept is a joke.