Soviets sided with Hitler until Hitler attacked them (then they switched sides). Soviets have been a thorn in the side of the US since. The Rosenburgs (executed for giving nuke tech to Soviets--though innocent) had an uncle who gave the nuke secrets. Since then, Soviets have had both a cold war with the US, and physical (but limited) wars in various nations. China helped Soviets in North Korea, North Vietnam, Cambodia, Laos. Often the US fought to a parallel (line of latitude) and fought no further, for fear that it would escalate the war(s), which made a perpetual war to slow the spread of Communism.
Who won the war, you ask? So far, the war isn't really over. Soviets and Chinese have nukes, and the Chinese just fired mach 10 missiles over US ships as a warning to stay away from the China Sea (US only has mach 4). Soviets, responding to email hacking of Podesta (campaign manager of Hillary Clinton), moved their Satan II missiles to their borders as Hillary threatened nuclear war.
Apparently, Hitler's influence has not been purged (yet).
The US barely won WW II. I don't think that eking out a narrow victory counts as justification of average sentiment winning.
As long as the world is not free, the dictators have won.