I also note that the host did say:
> So sorry, but we are planning to be up there now 4th of July week afterall
I wont presume to know if the host was racially motivated or not, but the response seems entirely plausible - possibly plans really did change. Either way this does not seem like something AirBnb could even remotely affect with policy. I don't think anyone could say 'plans changing' is racist, whether it's true or not.