Political Fears: Isolationism and the Red Scare
After World War I, America wanted to retreat from international involvement, and immigration became caught up in this isolationist movement. The US Senate rejected joining the League of Nations in 1920, preferring to avoid European entanglements entirely.
The Red Scare created particular anxiety about Russian immigrants who might bring communist ideas to America. These political beliefs directly contradicted American values like free enterprise, competition, and individual freedom. The 1919 Boston Police Strike was blamed on communist influence, with newspapers dramatically reporting riots and violence.
However, the actual threat was tiny - only 0.1% of the population were genuine anarchists or communists in 1920. Most immigrants were far too busy adapting to American life to plot political revolutions.
Anti-German sentiment during WWI had already shown how quickly attitudes could turn against "foreign" influences. German language was removed from schools and publications, and people with German-sounding names were banned from joining the Red Cross.
Key Point: While political fears grabbed headlines, the real driver of anti-immigration sentiment remained economic - Americans were most concerned about protecting their jobs and wages from foreign competition.