I think the US does not so much hate communism as the fact that we feared a communist expansion throughout the world.
While on paper communism sounds tempting, it does not work and has led to dictatorships forming in comunist countries. Also communism would ruin the existing economy in the US.

Also, Stalin waas a pretty scary chap, he raised hell with the USSR's own people, so naturally the US was a little scared, we helped put on tyrannical nutcase out of business, having another would be bad.