Look at the history of censorship and look at the current state of affairs.

9 out of 10 times, censorship is just a tool used to suppress things that the one in charge (a person, institution, or 'mob') doesn't like, while that same censor holds ideas equally or more intolerant than the suppressed ones.

I don't want to go into specific examples, because otherwise this thread will devolve into a discussion about those specific issues. But look around and try to analyze things impartially.