If we can manage to discuss the topic without the usual liberal hysterics we might learn something. First of all we need to understand that Communism was considered to be the primary enemy of America after WW2. The pop-culture educated might confuse HUAC with the Tydings Senate committee aka "senate internal security subcommittee". HUAC aka house unAmerican activities committee was a congressional committee. Both were chaired by democrats and senator McCarthy was a republican.