Not particularly artistic or skillful; pretty crude, in fact. But so was Mohammed. Amid all the Voltairian "I disagree with what you say, but defend your right to say it", I think it's appropriate to point out that portrayals of Mohammed like this are actually right. I don't think there's any doubt that if Mohammed were alive today, he'd get on fine with Osama bin Laden, and have contempt for those "moderate" Moslems who think there's something wrong with blowing people up. He was a slimeball, and it's appropriate not to let that be forgotten.