It confirms that, for the anti-communists, the historical facts are not what is actually important, it’s only the “feeling” they get when thinking about socialism that matters. That they not only try to convince others but even themselves to believe that things happened which never actually did, merely because it validates their emotions.

This is indicative of cult-like social conditioning, in which you are told to reject even your own memories when they don’t confirm to the cult-endorsed narrative, and replace them with the fiction the cult tells you is what you actually experienced. Unfortunately this is a common phenomenon in post-socialist countries nowadays

You will encounter people who lived through those times and who were perfectly happy at the time, but who have been so socially and psychologically pressured year after year to accept the narrative that communism was terrible and they were actually oppressed, that eventually they internalize this to a point that it changes their memories.

It’s a form of mass psychological abuse.