@Dobhakun Dobhakun i think on the previous chapters its semi-explained, being bunny kingdom are psychopaths and their entertainment are seeing red(murder and deaths), and because MC team are semi-labeled as heretic because they are not psychopaths and or joining the death cult they become target to be an entertainment for rabbit kingdom denizen.
i guess blue dragon kingdom enjoy senerity so being impolite and unruly can be labeled as not a denizen(which the lab coat guy shown by being in a rush).