It's authoritarian and the new heresy, full stop. It's no different than evangelicals who try to impose their morality on everyone else. "That word is sinful. Here's the proper word and idea." They also think it's simply about being a good person and defend it with that frame. To be a good person use the correct words and correct ideas as defined by us, the good people. If you disagree you are a bad person.
http://paulgraham.com/heresy.html