As long as I found the Nazi disturbing, the “denialism” in Tianmen square massacre or gulag or Ussr stalin purge or Uyghurs genocide from the far-left ideology is as much disturbing as the same from the far-right one. Just because this instance seems leftish and anti-Nazi, it doesn’t leverage itself to a better position.
Sorry just because you (or “we”) would love to put labels to pick sides, it doesn’t mean I belong to your described “labels” or “sides” because I treat far left and far right are the same. Maybe some political compasses can help. I don’t take sides. I agreed with the problems you think. Maybe you can try to stop putting labels (or picking sides) so that it might help to provide for some perspective angles. Wish you the best