I disagree, the best time to evaluate how a candidate behaves towards other people is when they don't know they are being evaluated. Were they stressed before/

I disagree, the best time to evaluate how a candidate behaves towards other people is when they don't know they are being evaluated. Were they stressed before/after the interview? Well, how one behaves when stressed matters too. Finally, yes, rudeness is subjective, but so are most things in life.