In the Furry Fandom, Nazism is not white supremacy and racism, it is actually Fur supremacy and Classism.
Furries want Zootopia to remain a Monoclass society. Have you ever wondered how preys and predators of the same class became brothers and sisters to one another despite their species difference? Have you not noticed that all citizens of Zootopia are Furry? Where are the scalies, the avians, ...? The answer is Class segregation. Scalies are segregated to live in the sewers, so that's why you did not see them. Look at these two Furry Supremacist: Fox and Bunny teaming up to keep the crocodiles in the sewers.
Most hated species:
Furries fear fire; hence the phrase 'yiff in hell', so no wonder they fear a swarm of black phoenix
raptors. They (firebirds) exist to set everything on fire.