Cartoon protestors guilty of idolatry?

Some pretty incisive thinking going on here:

So the objection to the cartoons cannot really be founded in the Islamic image-ban. They are clearly neither idolatry nor invitations to it. On the contrary, the insistence that a mocking representation amounts to a gross insult to the prophet is much more like idolatry in that sense: a demand that the man be revered as incapable of representation as God is.

But then truly religious people wouldn't go around burning down buildings and threatening to kill people, now would they?