many communist nations do not provide citizens the rights and freedoms that America has. The US was afraid that if communism took over, they would lose their constitutional rights.
us pres, Harry Truman established a 'containment' policy towards communist Soviet Union to not fight, but limit their expansion of power and belief.
"The Red Scare was hysteria over the perceived threat posed by Communists in the U.S. during the Cold War between the Soviet Union and the United States, which intensified in the late 1940s and early 1950s. (Communists were often referred to as “Reds” for their allegiance to the red Soviet flag.) The Red Scare led to a range of actions that had a profound and enduring effect on U.S. government and society. " (history.com/topics/cold-war/red-scare)
