There's good reason it always starts with "I'm not a fascist, but..." and as a matter of fact you have to stop 'em right there, right on the spot. Nothing less will do, because if you're making *any* concessions, we're all screwed.
Spoiler:
Of course they *know* what follows *is* fascist, making it more of a confession rather than an excuse, so slam that right back to their lying faces.