Holocaust victims
The Nazis thought of leftists as political enemies.  Leftists included anarchist, communists, socialists, liberals, libertarians and social democrats. German communists and Social Democrats were some of the first people to be sent to Dachau concentration camp.  The Nazi Party hated communism, and was worried that German communists would be loyal to the Soviet Union, a communist country.  The Nazis spread rumors about communist violence to get the Enabling Act of 1933 passed.  This law gave Adolf Hitler his first powers as a dictator.