Reminded me a bit of the Christian Book burnings and the Furore against Rock and Roll.
Every religion has elements like this that they class as "the devils work" or blasphemous.
If you beleive in the freedom of speech then people have the right to say or draw anything no matter how offense it might be.
People alos have the right to protest or object to that offence, but when it spills over into flag buring or the burning of Harry Potter books and then into violence it has gone too far in my opinion.
It's in no way just an "Islamic" problem although that religion has a particular bad PR at the moment from the western world.
I do agree that the images were offensive particulary the one with Mohammed with a bomb on his head. Way to indicate all muslims are terrorists
Muslims believe that Allah or Muhammed cannot be captured by human hand (infact I think they have a thing about the human or animal body being drawn) attempting to do it is a big deal for them.
Our notions of Freedom of Speech don't work in some parts of the world.