Got one who decided to respond to the deeper explanation to talk down to me about we need the definition to be more explicit.
I'll reiterate: anyone questioning the rule "no f fascists" directly is going to be a problem. There are no "false positives" because the signal is "willing to argue with a no fascist policy" not "full throated fascists!."
If you haven't adopted a code of conduct yet, that's where you put examples of bad behavior. If you're worried about folks not picking up on the subtly of the trap, put that example there.
And while you should absolutely get community input on rules, some things need to be deal breakers. Protecting fascism is high up that list. Also, ban anyone who questions the value of having a code of conduct. See previous statements about being a drain on community management resources.