Right? Funding media is one thing and using state/academic authority to alter history is a whole another level of crime. I borrowed the book from my sister to transcribe the chapter about USSR, I might share it as a curiosity later this week.

There are few fragments straight from the official history textbook for secondary school in Poland:

After Lenin's death and against his will, [Stalin] became General Secretary of the party. During his reign he eliminated all his political opponents and implemented in the country industrialization and collectivization. These measures, together with widespread terror policy caused millions victims in the USSR. In 1939 Stalin collaborated with Hitler's Germany, which resulted in assault on Poland and division of it's terrotiry.

(I bolded selected text by myself)

"Even so Stalin continuosly tried to rebuild close relations with [nazi] Germany, because both countries still had the same political interests. Soviet dictator was impressed by panache and efficiency of Nazi regime. Special impression supposedly made on him "Night of the Long Knives", when Hitler murdered his opposition inside the party [...]. Even during bitter competition, both totalitarian powers tried to create a common border, but main obstacle was existence of independent Poland.

Later on they write that both countries finally got to an agreement and launched a common assault on Poland, but Hitler supposedly betrayed Stalin and the alliance ended in 1941.