Let me get this right
Some muslims are upset by accounts of a caricature of the prophet (pbuh) which links him to violence. This is an outrage (yes, I know there's the issue of depicting the prophet (pbuh) at all, but as any google image search would show, that's hardly a new thing).
So the outrageous thing is prophet (pbuh)=violence.
And they protest this how? Oh, by setting fire to things, stoning other things and calling for general murder and mayhem.
Thus proving the point of the original cartoon. Or have I missed something?