Answer:
The methods of the HUAC and the treatment of the Hollywood 10 reflected the Cold War beliefs of people being afraid that communists were trying to undermine American culture.
During the Cold War, there was widespread fear and paranoia about the spread of communism and its potential to subvert American democracy and culture. The HUAC was created in the 1930s to investigate alleged communist influence in American society, and it became particularly active during the early years of the Cold War. The Hollywood 10 were a group of filmmakers who were targeted by the HUAC for their alleged ties to communism, and their treatment reflected the broader anxieties of the era about the supposed communist threat to American culture and values. The HUAC's tactics of subpoenaing and questioning people about their political beliefs and affiliations, and punishing them for refusing to cooperate, were seen as necessary measures to protect American society from the perceived communist threat.