XENON-RAMZ--
I'm sorry about your interview.And if I were you I'd be upset, and I"m upset for you, so I'm not AT ALL defending this interviewer but it sounds almost too bad/extreme, which makes me think this person was just testing you, seeing how you'd handle stress, or inapropriate comments aimed at your culture or background.
Perhaps, she wanted to see if she could hit on a hot-spot, and if you could control your anger. I know that I've had my buttons pushed in different but similiarly sucky ways during my interviews. I've wanted to walk out, but being desperate to get in, I usually end up taking the crap with a smile/semi-leer --which doesn't mean you should. I'm just saying that I'm not sure you should believe that the interviewer was truly racist, or that you won't get in. It's probably true that you'll meet with some racist patients as a doctor and it might be a valid point of assessment to see if you can handle it and keep your composure. Maybe you can take it, as everything elsein this process, with a grain of salt.