From what I read it sounds like it started out a little differently.
She, the renter, changed the reservation from 2 people to 4 (and some dogs?) and the owner began to have second thoughts about having agreed to this with the low rent fee.
The owner then got emotional and spouted vitriol, including a comment on racial background.
Big big mistake,  According to the LA times, in reference to the renter:
"She currently is enrolled in the Critical Race Studies Program at the UCLA School of Law"