Nativism
Nativism is the policy of protecting the interests of native-born or established inhabitants against those of immigrants. In the 1920's nativism was a huge problem because the natives of America felt they deserved better than the new immigrants coming in from all over the world. The Cable Act of 1922 changed the Women's citizenship act, it cancled out the law that would cause a women to lose her US citizenship if married to a foreign man. The immigration Act or Johnson Act of 1924 put a permanent numerical limit on immigration and began a nation-origin quota system. The Emergency Quota Act of 1921 limited the number of immigrants from any country to 3% of those already in the US from that country.
The Ku Klux Klan or the "KKK" was a white supremacy movement that were considered a right wing extremist orgranization. It flourished in the southern United States.