Don't know the answer to that one (I'll try to see what I can come up with when I have more time than I do right now), but there certainly are a lot of different kinds of terrorists. There are also terrorist groups in Mexico, and Central and South America, and also the Basque separatists, none of whom are Muslims as far as I know. The rebels in Sudan who are fighting agains the Sudanese government would probably be called terrorists if the US was on the side of the Sudanese government instead of on the side of the rebels. Many, if not most of them are Christians and Animists rather than Muslims. And of couurse the most spectacular of our own home grown terrorists here in the US are not Muslims, either.