Let me give you an example. I am against cheap shot labels on people. One our longtime posters wants to hang the term "creationist" on conservatives. I am conservative Republican, but I but I am the biggest supporters of evolution on here. In fact, I dare to say that evolution isn't over. We are simply the apex for now.
Therefore, his calling conservatives creationists is both not valid for all but in some cases insulting. It implies those who don't agree with him are dull witted. I always correct him, which he ignores, but I don't think his saying it should be banned.
People change what they don't what to be called. Liberals are now Progressives. Don't get mad if I call you tomorrow what you wanted to be called today.