Here is a conspiracy tehory.

Prior to WW2 France UK and USA (Capitalists) didn't bat an eye as Russia (Communists) Invaded numerous Nations in the east. China was to become a major Communist regime, that much was clear.

Later China, Laos, Vietnam, Cambodia, Korea fell victim to Communism.

And here is the kicker. During WW2 the Allied Nations, the Kapitalist Nations conspired with the Communist Nations.

The Allied Nations did not want to become Communist themselves though.