We have 2 separate points here. The first is how radical Muslims react to videos, cartoons, and any sort of perceived "slander" towards their religion. They cut off heads to protest somebody accusing them of cutting off heads. It's, at its core, childish, at the very least. There is no defending that kind of behavior, in any sane manner. Perhaps next time I am offended by an Obama bumper sticker, I shall shoot the driver of the car? After all, they offended me with their hideous sticker! Maybe they shouldn't have put it on their car.
The second point, the attacks on our embassies and the murder of an Ambassador. This had nothing what so ever to do with a poorly made video. It was planned, and timed for September 11th as part of an ongoing war. It's nothing short of a slap in the face for which we should rightfully bomb the ever living snot out of them, turning the entire region into an epic sheet of glass.