Also, in b4 fascists start pretending like the Stalinist bootlicker Thalmann hadn't spent the past half-decade backstabbing and burning bridges with the SPD, which had previously been cooperative with the KPD after the establishment of the Weimar Republic.
I don't like these "polemic" definitions. I neither like the marxist-leninist definition (everything not socialism is fascism) nor the idea that any state-socialism is fascism, even if it becomes authoritarian or totalitarian.
What I call socialists who insist on principles and advocate for supporting fascism is "stupid entitled children". But they are not really the problem. We just saw in France that the centrists there rather cooperate with fascists than with socialists.