Until someone just stands up and says 'Well, that's their opinion to be offended, and everyone is entitled to their opinion, but it's not my opinion so I don't need to listen to it', we are going to be subjected to the lone or small groups of idiots who think the rest of us need to accept their opinion as law.
Tell them that we understand that they have an opinion, but we don't care about their opinion, and be done with the issue.