I'm sorry, Dave. I'm afraid I can't do that.
In fairness, "Nazi" can be used to describe different aspects; I think it is helpful to specify that Scarlet Brotherhood is, in fact, a human supremacist (racial purity- Sueloise) group of monks, with thieves and assassins making up the lower ranks, that is planning on world domination.You could just say "Nazis" you know.
(All historic Nazis I know of were expansionist, supremacist and human. It's not like there's an option for magical rainbow unicorn Nazis)
It never seems any less weird when you type it out, either.