I have been a part of something like 150 interview loops. In that time I think I've interviewed exactly 1 white woman. In her case, everyone but a single person was in favor of hiring, and that one holdout was adamantly opposed (and eventually won). The person against hiring never said "I hate her because she's a white woman" but instead had reasonable sounding issues.

Given that "white woman" is such a rare category to interview, and, I assume, Dalit is pretty rare as well, AND I don't even regularly interview with the same set of people - how could I possibly tell when another interviewer is motivated by prejudice? Unless the interviewer says they are motivated by prejudice I'm either going to have to give them the benefit of the doubt or make a heckuva leap to accuse them of something.