From 1928 onward, the Nazi Party's growth into a large national political movement was dependent on middle class support, and on the public perception that it "promised to side with the middle classes and to confront the economic and political power of the working class."  The financial collapse of the white collar middle-class of the 1920s figures much in their strong support of Nazism. Although the Nazis continued to make appeals to "the German worker," historian Timothy Mason concludes that "Hitler had nothing but slogans to offer the working class."
In 1920, the Nazi Party officially announced that only persons of "pure Aryan descent [rein arischer Abkunft]" could become party members and if the person had a spouse, the spouse also had to be a "racially pure" Aryan. Party members could not be related either directly or indirectly to a so-called "non-Aryan". Even before it had become legally forbidden by the Nuremberg Laws in 1935, the Nazis banned sexual relations and marriages between party members and Jews. Party members found guilty of Rassenschande ("racial defilement") were persecuted heavily, some members were even sentenced to death.
Nazi Germany maintained concentration camps (German: Konzentrationslager, KZ or KL) throughout the territories it controlled before and during the Second World War. The first Nazi camps were erected in Germany in March 1933 immediately after Hitler became Chancellor and his Nazi Party was given control of the police by Reich Interior Minister Wilhelm Frick and Prussian Acting Interior Minister Hermann Göring. Used to hold and torture political opponents and union organizers, the camps initially held around 45,000 prisoners. In 1933–1939, before the onset of war, most prisoners consisted of German Communists, Socialists, Social Democrats, Roma, Jehovah's Witnesses, homosexuals, and persons accused of 'asocial' or socially 'deviant' behavior by the Germans.