Poland was no innocent bystander to the events leading up to WW2.
While the Soviets were offering hundreds of planes to help the Czechs resist the Nazis in 1938, and France and England sat on their hands, Poland was busy carving off a slice of Czechoslovakia for themselves.
That “slice” was stolen by the Czechs in 1920, while the Poles were busy saving Europe from Bolshevism.