Everybody downvoting this should read up on the Molotov-Ribbentrop Pact: https://en.wikipedia.org/wiki/Molotov%E2%80%93Ribbentrop_Pac..., especially the secret protocol to divide Poland between Germany and the Soviet Union.

Isn't this common historical knowledge? Sad if not.

I'm certainly no Soviet admirer or apologist as my last paragraph made clear. However, it seems a stretch to say that they helped create the Nazi tide. The Germans had such little respect for Soviet resistance, that they expected it to collapse like a house of cards within a few months. Hitler would have started the war, with or without the non-aggression pact.