Assuming you mean as description of a contemporary person, in casual sense.

A nazi is someone consciously inspired by Nazi Germany, typically by using its symbolism or alluding to it, holding some ideas specific to the period but not necessarily all. A fascist is someone that supports a specific model of government and policies derived from ideology called fascism.

Every problem can be solved by adding another layer of abstraction.

I read about it once and thought why couldn’t I give back at least as much, even without religious justification. Perhaps ironically in this context, part of the amount goes to my local atheist charity.