The Russians push the simplistic version they were victims, when Stalin already had them internally in a state of war for a decade. they had committed a brutal genocide in Ukraine, and had participated in the invasion of Poland and Finland . How many of their war dead were soldiers being shot by their own government? Reprisals from angry Ukrainians or Belorussians?
As you sow, so shall you reap
You nailed it about the Soviets basically being at War for a decade before World War II began. And it was the war Stalin declared on his own people.