I think it was a warranted bias. Obviously in the show's past there was a time when predators predated, or they wouldn't have brought it up.

That makes it more noble. The Rabbit is not just getting over a silly uninformed prejudice, but is willing to intellectually set aside the ongoing murder of her ancestors to fully analyze a case. "Sure, they are naturally violent and we all know that, but is that enough to account for ..." She's a real investigator who refuses to be distracted.