people would call that out as baiting.
Or they can actually shut up on the topic and maybe play and enjoy the server, which is the point of why people host servers? If you're offended with someone's opinion on something, then why don't you boycott the server by leaving it and never rejoining? At least the host won't have to deal with you.
It's the host's server, and it's his or her opinion, not yours. You don't get invited to your friends' house and fight with their parents because they have a specific opinion. You're the guest, not the parents. If you really don't like it, as I said before, you can simply decline the invitation, or in the case of the server, not join.