“Fight those who do not believe in Allah, nor in the latter day, nor do they prohibit what Allah and His Messenger have prohibited, nor follow the religion of truth, out of those who have been given the Book, until they pay the tax in acknowledgment of superiority and they are in a state of subjection.”

Isis and Hamas are literally doing what their holy book tells them to.

I’m open to other interpretations of what that verse means but it seems pretty clear to me.