And I agree with that poster. The protests are based entirely on flawed thinking. They are committing idolatry by their own religious texts, they are protesting in weird places (Birmingham? what relevance has that got to a film made by one American loon?), their religious texts don't apply to non-believers, so why should non-believers pay any attention to it?
Flawed thinking of course! Logic and reason do not apply (see post 3 in the thread!) but if people are to be free to believe whatever they wish, then asking for logic and reason is just YOUR value judgement.
So, the reasons do come down to them seeming to want to cause trouble. Are we not entitled to our own opinion, or do the freedom of speech rights not apply to us?