Nazism
Nazism is an extreme right-wing fascist ideology developed by Adolf Hitler and other members of the National Socialist German Workers' Party that preaches the extermination of the Jewish and Slavic "inferior race" and the preservation of the Aryan "superior race", supported by by scientific-racism. During Nazi Germany (1933-1945), Adolf Hitler allied himself with multiple non-Aryan races merely to gain support, since Italians and Japanese were not part of the Aryan race.
The Neo-Nazism abandons the idea of Aryan German and replaces it with generic White supremacy.