Just look around you today and compare the United States as we know it to the U.S. and Germany of the 1930s. The U.S. today has far more in common with Germany of that era (in many different ways, not just "bad" ones) than with the U.S. of that era. Our culture, science, and approach to governing is based on a nihilistic, utilitarian outlook that most Americans in the 1930s would never have thought this country is capable of.
And as far as the Soviet Union is concerned . . . Just look at our media, government, and academia these days. I have a hard time believing that Americans in the 1930s would have tolerated so many overt, unapologetic communists holding positions of authority in these institutions.