What you write on argumentative strategy absolutely pertains to the topic and I’d say it also holds true. I just don’t really see what it has to do with fascism. Aren’t you conflating a couple of things here?
Even when “Fascism traditionally employs that rhetoric” holds true, there’s no way that “Someone employing that rhetoric must be a fascist” can ever follow from that. A fascist might be a very special kind of moron, but it’s dangerous to then start calling every moron “fascist”, because it lessens the impact of that term, devalues it, if that makes sense. It makes undermining actual fascism much harder.