I definitely believe you. A Russian colleague, who is living in EU for several years, found it justified that Russia invaded Poland back in 1940. We were all baffled.
>seems that holding joint parades, signing secret pacts, sacrificing Comintern, etc, still did not help much.
Neither did appeasement. The correct response to Ribbentrop's suggestions was war on Germany, just like the correct choice at the Munich agreement was war on Germany. Beyond that, you're just choosing between bad options.