During the Cold War, America detesteted Communism in all it's form, especially Russia. USA took matters into their own hands at one point, pushing many countries to practice containment (meaning they wouldn't practice or publicize communism). The main reason for this rivalry was because Russian communism was the opposite of capitalism in many people's eyes. Communism basically gave complete control of everything to Russia, while capitalism made a harmonic balance between shared power power between the people and the state.

Geopolitical and Ideological Rivalry between the United States and the Soviet Union