We are dealing with people here that still subscribe to 7th century remedies for their condition. Ever heard of "Twelvers" Ahmadinjihad is one. And if Islam is a billion and a half, then just 10% (conservative estimate) are radicalized, that's 1 1/2 million jihadists all believing the worst parts of the Hadith, and Koran as literal in terms of killing non believers. These radicals have the rest of the religion hostage, through intimidation.
They may not have the means, but they don't care, to die trying is their greatest calling.