The similarity that I see between Zionism and Nazi is their imitation of the British diaspora's war crimes. The Nazi copied the war crimes from the British diaspora against Indigenous groups in North American, Pacific, and Australia like the Indian Residential fake School death camps that existed since 1850s and that continued in secret in 1997. The Israel did copied the approach of Pax Americana of violence, mass murder, thief, property destruction, and anti-terrorist terrorism against innocent civilians in their conflict resolution.
The more established term is fascists which refers to an ideology that advocates for military expansion and supremacy of a nation. Nazi had become a term to denote a type of fascism with the idea of a superior race from the many psuedo science that European diaspora fabricated to justify racism against non-Europeans and against other Europeans. National socialism is a term that Hitler coined to steal the good reputation that real socialists made for the label despite Hitler's overt persecuation of Socialists and enforce the Capitalist redefinition of Socialism to mean command economy.