In the first two decades of the cold war, how did competition on the international stage and a climate of fear at home affect politics, society, and culture in the united states?

In the first two decades of cold war, the competition between united states and soviet union caused an era of fear of ideology called the red scarce.
This fear is based on the fear of the danger of communism from entering the country, which made the people became in favor with the politicians that are running to fight the cold war and became volatile to the eastern European culture.