It's possible for both USSR to be bad and totalitarian reactions to it (Red Scare) to be bad.
Thank the reds we're not all forced to speak German.
Think of the context. WW2 was absolutely a team effort.
Yeah, 400,000 dead Americans and 27 million dead Soviets [1]. I'm no fan of Stalin but one thing that's absolutely irrefutable is his efforts killing Nazis. The human toll for that was unimaginable.