Unfortunately, everyone can call anyone a fascist. That's the entire problem. Any system wherein one group can just dismantle another because of their politics will be abused. If whatever magical law/mechanism your nonsense required existed and had been used after the 2020 election, trump's successor would simply have done the same thing to the Democrats next time but we'd be even worse off as there would be no constraints on their power and no viable opposition, unlike the Dems who now stand a Puncher's chance in the goddamn Senate. Being the good guy is difficult but the road you propose inexorably leads to authoritarianism. I get that politics is slow and boring but this isn't a video game.