Why would it, as no real historian denies the Holocaust. But that is besides the point, as these discussions propably don't need facebook to take place. And if they do, that in itself might be part of the problem.
I somewhat agree that it doesn’t “need” to happen on Facebook, and I think it’s OK to stake that out as a rule: Don’t debate anything about the Holocaust on Facebook, take it elsewhere. Meet with your history buff friends on Telegram and hash it out.
That being said, as long as the discussion is based facts, primary sources as much as possible and doesn't cherry pick and stake up the Holocaust against other war crimes, I agree that we need these discussions.