Religious fundamentalists of all denominations are among the easiest people in the world to bilk, takes advantage of and fanaticize, because they are unable to think logically. Muslims are easier because of the lesser degree of education in Muslim societies, Of course, there are some of the leaders of ISL that are making out like bandits.
The Muslim fundamentalist movement is a reaction to the changes being forced on the traditional societies by Western prosperity and the awareness of it spread by the media.