What is it you would call coordinating military efforts against a common foe?
It would seem it has a different name when the Finns and the Nazis do it than when the Soviets and the Nazis do it.
We both know you’re too smart to actually believe the situations are comparable.
You’re absolutely right. The Soviets actively pursuing the destruction of a sovereign nation by cooperating with the literal fucking Nazis, in the interest of the Soviet Union’s desire to quite literally genocide the Polish people, not unlike the Nazis, isn’t really comparable to the Finns cooperating with the literal fucking Nazis to retake territory that was seized and ethnically cleansed from them.
The Finnish choice is unforgivable, but you’re right, the Soviet choice was much worse. On account of being an active pursuit of genocide as well as an instrument to the Nazi genocide.
Soviet Russian chauvinism in the context of pan-Slavism was many things, but it wasn’t genocidal towards Poles as an ethnicity. Murderous towards anyone that might be able to rally resistance, certainly, and it exploited ethnic divides in the time honored tradition of any colonizing power, but it wasn’t anything like Generalplan Ost and you know it.