Most anti-communism has no basis in reality and often are myths perpetuated by state agencies. All Anti-Capitalist sentiment is rooted in the material realities of our world and life. To deny socialist historical reality is to deny your own history, and ultimately is an admission of your disingenuous support of the truth.
Historical Materialism is truth seeking in practice. It requires you to have a fact based, objective view of our past and present.
Also I don’t know why I would whine, because I’m not using lemmy.ml. That instance can have whatever rules they want. I wouldn’t block or defederate from them because of it either. But if you are not interested in seeking the truth and objectively observing reality, then I guess you can insolate yourself from it and keep your echos.