Why did members of the house un-American activities committee target screenwriters directors and others who made there living in the movie industry

Due to suspicion of communist activities.

Explanation:

During the Cold War, the authorities accounted for within the country with anyone associated in any way with communism. Thus, the action was taken in which about ten Hollywood directors and screenwriters were arrested. They were arrested on suspicion of supporting and propagating communist activities. Most were imprisoned, and some members of the group admitted that there were some communist activities in Hollywood.

the dominoes began to fall. the surrender at appomattox took place a week later on april 9. while it was the most significant surrender to take place during the civil war, gen. robert e. lee, the confederacy's most respected commander, surrendered only his army of northern virginia to union gen. ulysses s. grant

explanation:

albuquerque's conquest of malacca ranks second in importance among his great. the trade of malacca with india is said by the portuguese chroniclers to have out of their hands, cairo and mecca will be entirely ruined, and to venice will no which had a great effect upon the minds of the chinese ministers