A distraction from the matter at hand. The matter for discussion here isn't really the relative merits of the USSR, or of Marxism-Leninism versus Anarchism, or so on, it's about the pathology of latching onto these things, making them an identity, and then engaging in little ingroup-outgroup battles using them as a prop.
It's helpful to map this sort of thing onto sports. Yes, the Slurforindians have beaten the Slurforblacks in the world series and that's great, that's an objective sign they played the game better, etc. But you feel yourself part of a little group here - you see your team's victory as your own and it makes your own boring life feel more interesting, more exciting. You laugh in the faces of the other team, the losers, oh how they're hurting. But the thing is: you and them, you're the same. You didn't play the game, you didn't win anything, you're an observer rather than a participant in these events. But deep down inside the part of the monkey brain that once recognized your monkey gang had beaten the other monkey gang sees the ingroup fighting the outgroup and kicks into action.
People often warn that there's a skeleton inside you, but feed him milk and he will serve you well. The monkey inside you on the other hand is an eternal liability, he is a cheeky monkey, he wishes only to get up to monkey business and get you into trouble.