What is one mass violence committed by a totalitarian state in the 20th century?

The chinese exclusion act was the first significant law restricting immigration into the united states. why do you think the us government singled out chinese immigrants in particular for exclusion?

What group elected their first democratic member of congress under the new deal coalition? a- northern blue collar workers b- african americans c- native americans d- poor southern whites

Why did french and austrian troops stops revolts in spain and italy