Because Americans were afraid of communism and anarchism and did not like how the russians(communists) were coming over to their land so they created a quota system or a limit on immigration Hoped...
The Red Scare led to McCarthyism where ordinary citizens could be blacklisted, or prevented from getting a job, if they were suspected of being a communist.
It happened during the cold war because people were scared of communism and its spread across the world. The theme of the cold war was the prevention of the spread of communism, and many people...