Thanks to Vladimir Putin and his loyalists in the West (plus some horrid precedents set by our own F.D.R during the war) the horrors and atrocities of Stalin and the Soviets have been overshadowed (and in some cases justified) by Stalinist Russia's contributions to the Allied efforts against Hitler.
I’ve read your post several times now, and it still doesn’t make sense to me. I’ll stop right there before I fall into the “mind-reading trap” that Scott Adams warns us about.
From where I sit, the people who are loudest in condemning Putin here in the US are the same people who are most likely to excuse Stalin’s crimes. Maybe that will give you a clue why I don’t understand your post.