I saw tonight's special episode of The West Wing (yes, they finally drew me in this summer!). The episode dealt with terrorism, and the multi-layered debate on it from all sides.

They used an accurate logic point about Islamic Fundamentalists, who are not to have other followers of Islam lumped in with them:

Islamic Fundamentalists are to Islam like the Klu Klux Klan to Christianity.

I can't think of a more accurate description of this splinter group.