In Polish high schools they seriously teach that Soviets were in the alliance with III Reich and that Stalin supposedly admired Hitler (if I recall correctly skimming through my sister's book).
It goes deeper - they basically accuse the USSR of co-starting the World War II and other disgusting lies making communists look as bad or even worse than Nazis. It is formally approved as a school material and many if not most people unironically believe that the USSR was genocidal red-fascists empire.
Since propagating communism is illegal here, bookstores don't print almost any good literature that would counter the state propaganda and the country exists in a capitalist fantasy bubble.
I was lucky enough to never trust educational system, but people who did are basically brain damaged now.
Sorry for chaotic style but I'm sleep deprived and I wanted to share this atrocity while I remember, I may share some more information tomorrow.