What did the Nazis who came to power in Germany in January 1983 believe?

It seems there may be a mistake in the date you provided, as the Nazis came to power in Germany in January 1933, not 1983. The Nazis, led by Adolf Hitler, believed in a totalitarian regime based on extreme nationalism, militarism, and racial purity, asserting the superiority of the "Aryan" race. They promoted anti-Semitism, viewing Jews and other minority groups as threats to society, which justified their oppressive policies and ultimately led to the Holocaust. Their ideology sought to unify the German people under a singular, authoritarian state, eliminating political dissent and promoting aggressive expansionism.