Lindsay Ellis's shit takes aside, she makes a very good case for parodying fascism (Nazism in particular). Fascists haven't appropriated Mel Brooks's lampoons of fascism. They unironically love American History X and sing "Tomorrow Belongs to Me". Nazis do not love "Springtime for Hitler" in the Producers or Jojo Rabbit because it makes them look silly and dumb. Fascists don't have a coherent ideology and build their ethos around telling themselves they are badass warriors, so parodying fascism by making them sing and dance like clowns is good.