Earlier quoted context omitted.
The West aren't entirely the good guys here. My own city was liberated by Polish troops. After WW2 they obviously couldn't go back to Poland. A lot of them ended up in relative poverty after the war. At least Canadians and Australians went back home and got a parade.
Yes, that was awful. Not to mention pushing Poland into Eastern Bloc and then putting embargoes on it.
It was a choice between giving up a lot, not just Poland, and continued war. Must have sucked pretty damn badly if you were one of the things given up to Stalin, but ...