I really don't think Muslims are moral imbeciles who have no control over their own actions and responses. If Christians rioted in the streets and threatened violence to Muslim leaders over perceived insults (for instance, the fact that Christianity is illegal in Saudi Arabia), nobody would say those Christians bear no responsibility for their own actions.
I find it hard to believe that Benedict wasn't being deliberately provocative. But if indeed the Emperor's statement was insulting to Islam, why aren't Muslims equally provoked by Muslims who say these same things about their own faith? Where's the Muslim indignation over terrorist bombings, honor killings, and religious persecution of non-Muslims (and Muslims of different sects)? If the Qur'an teaches there can be no compulsion in matters of faith, how can Muslims tolerate the religious policies of Saudi Arabia?
I'm no admirer of the Pope, but it seems to me that Muslims ought to have more pressing concerns at home to worry about. Where's the concern for justice? If Islam is a religion of peace, show us.
As for the Pope, when he forbids Catholics to participate in unjust wars and renounces the practice of withholding Communion from Catholics who don't vote as they're told to vote, I'll believe he's serious about peace, too.