Add to Poland everything east of Germany plus Austria, in addition to the tens of thousands of Poles, Czechs, Ukrainians, and even Americans and Brits "repatriated" to Stalin then subsequently sent to the GULag, or murdered outright.
I'll agree on this one. Though some large but unknown percentage of them were willing collaborators with the Nazis and war criminals who deserved everything they got.
But handing over tens or hundreds of thousands of men to torture and death without a hearing was an appalling thing to do.