PTB. Substantive discussions around the definition of genocide are not the same as Nazis saying the Holocaust never happened or whatever and I think it’s ridiculous to conflate those things. There is no rule that would cover this other than one against misinformation—but OP has not challenged the facts on the ground, just the way language is being used. Language is always going to be a subjective and arbitrary thing.

That said, other things OP has said here might constitute misinformation so that makes me wonder if there is any missing context beyond this single comment.