@BatuMenhir
By the favour the rabbit chief asked the MC to tell the people living in the town I do not think it was like you assumed.
My guess is that some kind of human superiority racists have taken over some positions of authority / power - for example high ranking positions in the government or religion.
Then those guys changed the law / religious guidelines that only humans are "real people" while demihumans would be supposed to be servants or slaves only.
Upon creating those new rules they sent armed forces to make sure that every town and village under their control follows and executes those rules.
As such the rabbit people had no choice but to run from the town because they would have been enslaved by those forces otherwise.
Also if they would have stayed the friendly human people in that town would have been forced either to disobey the new rules and be punished for that or to follow the rules and enslave their own non-human friends.
So the rabbit people probably also fled to prevent their human friends from being thrown into that dilemma.
This would explain why the chief wants the MC to tell the people living in the town that the rabbit tribe is living peacefully now.