It is true to that they joined the Allies, and the Eastern Front was very important to defeat of Nazi Germany, but let’s be honest when the Molotov-Ribbentrop Pact ended: after Stalin and Hitler coordinated a joint invasion of Poland.

To act like the Soviet Union was Ireland or Switzerland at the start of the war, is disingenuous. Stalin and Hitler made a secret plan to carve out an Eastern European sphere of influence, not unlike the Japanese sphere of influence in East Asia.

The irony of course is that Stalin still got his sphere influence, albeit through the Treaty of Yalta.

It lasted long enough to split Poland up between the two of them.

anecdotal evidence doesn't really go to show anything