I also thoroughly agree with your perspective. America after WWII was soon engulfed by anti-Communism, though, so the exclusion and distortion of Russian history was a function of that. I used to write school textbooks in NYC. Got assigned to create a chapter of exercises with adverbs using the "space race" as a subject. When the first sentence described Sputnik as first in space and the second sentence began America's space story, the editors demanded that the sentences be reversed in sequence---or the Russian reference cut out entirely. I never learned which way they went, but that was how careful they were to avoid "offending" the . schoolbook markets. So they put profit before fact, and here we are. Peace, friend.