I've had an interviewer laugh in my face when I told them my favorite language was Scheme.
Then they just walked out in the middle of the interview without saying a word when it wasn't going well, leaving the other interviewers to continue without them.
At the time I didn't say anything, and just continued the interview as if nothing happened, but in retrospect, I think I should have politely terminated the interview myself, as I don't want to work with rude, unprofessional snobs, but I'm wondering what people here would have done, and how you've faced rudeness during interviews yourself?
You are the candidate and hold equal power. In the thought process you had "I think I should terminate this interview." If it ever gets to a point you are uncomfortable due to rudeness, leave. Sure, in a big faang world you may never have interaction with that person, but them being on the panel has a chance they would be your boss, peer, or in your org some way.
Toxic people can ruin what would otherwise be good careers. Alternatively, this can also be a huge indicator a company tolerates and promotes this behavior. To me, while it's possible, that this was a once and rare thing that only this person has done... Screw betting my career on the least likely possibility.