What was a similarity between the red scare and McCarthyism?

Both the Red Scare and McCarthyism involved widespread fear and suspicion of communism in the United States, leading to a climate of paranoia and the persecution of individuals believed to be communist sympathizers. They were characterized by aggressive anti-communist rhetoric, government investigations, and blacklisting, which often violated civil liberties. Additionally, both periods saw the use of Propaganda to stoke fears of a communist infiltration in American society and institutions.