For all his faults, he can be reasonable at times. So I would go with completely brainwashed, and rule out unstable or personally insecure.<quoted text>
The sad part is that he doesn't even realize he's being unreasonable. How insecure, mentally unstable or completely brainwashed must someone be that they would be in favor of killing someone that disagrees with or mocks their beliefs.
You know, Roger Waters just got a lot of flack from Jewish folk because at the end of his concert he floats a huge pig blimp with a cross, a star of david, a swastika, etc etc - his statement against organized religion. Personally, once I found out he didnt single out any religion in particular, I decided I couldnt care less.(I still find is politics reprehensible). Why cant Muslims act the same?