The U.S. government, just a few decades ago, had an undemocratic habit of suppressing dissent by labeling any person or organization whom they perceived as disapproving official actions or policies, for whatever reason, as communist. In the heyday of McCarthyism and cheerleading jingoism, this was an enthusiastic effort joined by both media and government, as exemplified by the video above.
Government propaganda, amplified by right wing media, about communism, tried to pick out individual people and give them the horrible label of communist, equivalent to being called a devil. This guilt by association is very undemocratic and typical of totalitarian republics. So-called American conservatives often, unknowingly, advocate policies typical of totalitarian governments.