Good insight! My family is Polish and left after the war. My exposure to the complexity of wtf happened started at a young age, like my grandmother lamenting how curtailed her rights were in Australia vs soviet Poland where she was respected as an independent worker. While also discussing the atrocities that happened during the occupation and the trauma of marginalising religious life and shit by force.
I suppose halfway across the world it's just "reds and blacks bad. Glorious allies (no no the white allies (Slavs weren't white yet)) save the world"
So it looks like I'm defending something universally horrible, instead of trying to be like why did things go the way they did?