Part of the problem though is that the Danish Cartoons, the Draw Mohammed Day and, to a lesser extent, the Burn a Koran Day are actually reactions to Islamic pressure on either Free Speech or precieved pressure on another religion. It wasn't something done in isolation just to "rile them up". Obviously some people took the opportunity to do just that, but it shouldn't be needed because the events themselves shouldn't be needed.
Burn the Koran Day was done simply to garner a reaction, there was no pre-received insult from Islam on anyone except the misinformation about 9/11 and who was responsible.
The Danish Cartoons were somewhat different in that they were an attempt (allegedly) to bring attention to self-censorship and freedom of expression, the artists saying that we see humorous and critical cartoons of other religions. I cannot help but wonder what the reaction would have been if the cartoons had depicted Jews killing Christ in various humorous ways or the Pope standing gloating over graves of holocaust victims (as is the latest Dawkins claim).
Interestingly there is some debate over whether depicting Mohammed is offensive to Islam or it's followers at all as the Qu'ran doesn't explicitly forbid it and Mohammed has been depicted in various ways within Islamic culture for centuries, the edict seem to be something that is fairly recent in Islamic culture.