As some other people have pointed out, Poland was briefly at war with the USSR during WW2 because the USSR made a deal with the Nazis to divide the country. Finland was allied with the Nazis for a time out of desperation; it’s debated if they were considered an axis power. And groups from the Baltic countries, seized by the USSR in the chaos of the early war, fought guerilla campaigns against the Red Army well into the 50s (see the Forest Brothers) as well as insurgent groups from a few other eastern European countries like Poland.

The most likely scenario though is that the Poster is an American, is fundamentally ignorant of WW2 history (or any history) and has no clue what they’re talking about.

don’t let .ml hear you say that or the screeching sound they make will be ear splitting