@Bobko
Also, under the horrible Soviet domination 1945-89, Polish population almost doubled (from 23 to 40 million) and overwhelming majority were Poles.
Poland, even if politically dependent on the SU, was ethnically, linguistically and culturally almost 100% Polish.
What happened to our internal ethnic cohesion and birth rates after we "regained freedom", everyone can see.
how has Russia ever betrayed Poland?
Well, I wouldn't say "betrayed" - you were simply an enemy: partitions, uprisings, Polish-Soviet war, Ribbentrop-Molotov, 17.09.1939, Katyn, eating popcorn while watching the slaughter of Warsaw. Enemies. It would be strange to accuse an enemy of betrayal.
However, you saved us from nazi genocide, and when we were Warsaw Pact allies (even if not entirely out of our own accord), you behaved rather decently.
And, not to forget, when we finally decided to go our own way, you withdrew your troops without a single shot (which wasn't, I suppose, the only option back then).
... and you will play one more important role in Polish history, before our glorious revival.