To summarize: you can be a confirmed Bushophobe and still acknowledge that the cartoon rioters are idiots. Likewise, you can be a fully paid-up member of the Vast Right-Wing Conspiracy while realizing that just because you can do something like publish cartoons that offend Muslims, doesn't necessarily mean you should, especially when the lives of U.S troops might be at stake.
I'm not too sympathetic with the notion that anything under the cover of religion is automatically entitled to deference. On the other hand, "don't be an asshole" about peoples' religious beliefs when they aren't trying to impose them on you seems to be reasonably good etiquette. The cartoons weren't funny and the visual portrayal of Mohammed was done just to "be an asshole" without any larger point to it. It's like parading around in blackface just for the hell of it. There's no point other than "I'm doing this to see who I can piss off." I certainly defend the right to piss people off, though not always the decision to do so.