"just looking for an excuse to raise hell "
Exactly. They are a belligerent, intolerant people looking for reasons to hate outsiders. This is simply yet another example of the inevitable clash of civilized western culture and primitive Islamic culture. The Muslim world in general just can't understand higher cultural concepts and values like freedom of speech and individual rights. These concepts began to form in the western world 200 years ago during the Age of Enlightenment, a intellectual philisophical movement that the Islamic world completely missed. Their answer to anything they find offensive is to blow it up or cut its head off. It is almost like their entire culture and society is infantile where Western civilization has matured.