The Muslim world have a problem on their hands. The terrorists (and their simpathisers) have hijacked their brand.

You raise an interesting point. Why is it that crazy people who happen to be Muslim are styled "Muslim Extremists" and/or "Muslim Terrorists"while crazy people who happen to be Christians ( and who can match or exceed their Muslim counterpartsatrocity for atrocity) are not styled "Christian Extremists"?

The terorists haven't "hijacked" the Muslim's "brand"; rather Muslims as a whole have had the "terrorist" brand thrust upon them, and the problem is more with the "Christian"[sic] West who have done the thrusting.