Nazi is a slur anyway
From the Oxford English Dictionary :
Etymology: German Nazi (c1920), shortened Nationalsozialist or Nationalsozialistisch (see National Socialist adj. and n.). Compare French Nazi (1930). The spelling with z probably arose by analogy with Sozi (shortened Sozialist socialist n. and adj.).
The term was originally used by opponents of the National Socialist German Workers' Party and may have been influenced by Bavarian Nazi, a familiar form of the proper name Ignatius and used to refer to or characterize an awkward or clumsy person.