Answer: They feared that they would make popular movies that promoted communist ideas.
Explanation:
In October 1947, ten screenwriters and directors were arrested in Hollywood during an investigation into the communist influence on the American film industry. These people are imprisoned and forbidden from any future activity in the film industry. This is just one of the reflections of the anti-communist action of the United States government and the aftermath of the Cold War, which has undoubtedly affected the very citizens of the two "warring" parties. Eventually, all members of the arrested group were sent to prison, and some finally claimed that they had some doubts that there were people of dubious political ideals in the industry.