I know what you're saying. I have to deal with some particularly hateful things because of lies that are very "sticky" because some people very much want them to be true.
I think, if you see ongoing responses based on those lies, emphasizing/repeating the truth helps, possibly pointing to public facts. Some people will choose prejudice and some will want you to be the bad actor, but those aren't the people you're trying to inform. It's the people who don't know or were deceived.