This relates to the idea, as the creators explained, that the animals are not stand-ins for humans, and predators do not stand in for any particular minority. Once you start thinking of Zootopians as stand-ins, the movie quickly gets offensive. I think that's the real problem I have with the Rohde tweet that keeps on popping up, though I'm not sure he meant that Zootopia was racist.
Any mention of "allegory" by the creators refers to a modern sense, which merely states that there is some loose, albeit intentional, similarities; you're not supposed to think every aspect of predators refers to, say, Black people.
Zootopia was a fantasy about animals first, so you don't have to think this way.
Even if you don't think it fits in Animal Kingdom.