They keep using "Nazi" or any variant thereof (including "fascist", and some people use the terms interchangeably) because among the "normies", these words still carry heavy weight. The average non-politisperg who doesn't keep up will assume the woke who accuse others of guilt-by-association far-rightism are making an accurate declaration, and will believe because they were told, "oh, Jordan Peterson is a Nazi because Ta-Naheshi Coates said so and he's black so he must know a Nazi when he sees one" and never question it. The concept that the term is getting diluted and ultimately rendered meaningless completely escapes these people because their heads are buried firmly in their asses, within which is a flashlight and a copy of Saul Alinsky's "Rules for Radicals".