Naomi, i totally abhor everything the Islamic extremists are about. Those carrying out these atrocities are evil incarnate. Like many religions, they have warped and shaped their religious scriptures to meet their own ends.
However, to tar all Muslims with the same brush is, imho, wrong. And, while it is true that i haven't studied Islam nowhere near as much as you appear to have done, my comparison with NI is not borne of ignorance. The point i was attempting to make was; every terrorist may be Muslim, but not every Muslim is a terrorist. So why do some look upon them all as if they are.