Propaganda is such a sad historical tool. As is treason, whenever it occurs.
Imagine if Poland had allowed a Pole to be hired by factions in Germany after the war to argue that what Germany had done to Poland in 1939 was actually a good thing?
In my universe, he would have been found torn limb from limb very shortly after the fact.
And rightfully so. Ditto for any Pole who would do the same for Russia.