I’ve got no loyalty at all to communism or marxism. But I do have a loyalty to honesty, and I have to object. I don’t see a denial of the Massacre in the screenshotted comment. I see a characterization of it as some kind of US-led attack.
They aren’t saying anything like “that didn’t happen” or “people didn’t die”. Maybe they say it elsewhere, but not here.
Bingo. There's a difference between saying it didn't happen and "it happened but it was good". I would say later is worse. But pretending they are saying something they clearly are not isn't good