Regardless of how you spin it, nothing will stop people from making ignorant, unintellectual, disrespectful movies about anything and everything. Since Islam has been in the headlines these past years, it has become fair game for all sorts of criticism, disrespectful and otherwise.
Violence to censorship won't stop it and will only serve to demonstrate the content of the movies are correct.
From your perspective, it's ignorant and disrespectful. So what? There is ignorance and disrespect everywhere. If violence is the only way you know how to deal with it, then you cannot claim Islam to be a peaceful religion.