The Soviets also had the goal of exterminating the Polish professional class, hence their massacres at Katyn & elsewhere of, among others, Polish Boy Scouts.
Few people realise that the Soviet Union took roughly one-third of Poland when it & Germany invaded Poland at the beginning of the Second World War — and it kept that territory after the war. Polish society in those conquered territories was replaced with Russian society.
This is the point of view taught in Polish schools, so it's unthinkable for a Pole to think otherwise. However, Lithuanians, Belorussians and Ukrainians would beg to disagree.
For me the most fascinating is the case of Lithuania. Polish children are taught about the Commonwealth, common history, fighting together... So when they hear about anti-Polish sentiment there, it makes no sense to them. People are surprised and can't understand it. That's the fault of presenting a one-sided version of history and completely ignoring the POV of your neighbors.
Few people realise that the Soviet Union took roughly one-third of Poland when it & Germany invaded Poland at the beginning of the Second World War — and it kept that territory after the war. Polish society in those conquered territories was replaced with Russian society.