I agree, but I’m not particularly aware of the role of the Soviet Union being diminished. Don’t most people who have a passing knowledge of WW2 know that the battle of Stalingrad was the turning point on the Eastern front, and by extension in Europe? I’m asking in good faith by the way!
Worse.
But I'm not sure giving a widely taught example of the US' contribution to the war effort to diminish that of the Soviet's disproves my point.