Seriously. How are you able to say these things without a hint of self awareness. You know what it looks like to enter a war voluntarily? It looks like the US and Israel bombing Iran. It looks like the Third Reich invading every country on the path to Russia. Like what the fuck do you imagine you are saying? The USSR knew that engaging in war with the Third Reich was a necessity as soon as they got a copy of Mein Kampf. It's such a ridiculous statement to say that because the USSR joined the war out of necessity that therefore it is not appropriate to consider that their defeat of the Nazis was a good thing that the USSR did. Ludicrous.

Most leftists do NOT ignore the flaws of the USSR. In fact, those flaws are studied as part of the process of historical materialism. For example, every leftist knows that Stalin was a violent paranoid control freak. Every leftist knows that the repression of religion was a major mistake. Hell, even the USSR figured that one out and reversed the policy.

If you think leftists ignore the USSR's faults, that's on you. But if your problem is actually that you believe the faults of the USSR erase anything good that could possibly be attributed to them, then that's a different problem and it's intellectually dishonest to say that the only proper way of acknowledging the flaws of the USSR is to condemn the entire project, denounce it, and never use it as an example of something good. Those positions are not equivalent