[aniket_ray]

No, just no.

A candidate is taking time from their busy schedule and are considering making a contribution to your company/team/project. You should appreciate that more.

In the real world, shit happens. There are an inordinate amount of things that can go wrong and delay someone. In this case it's all the worse, since the problem was the interviewers own organization. The interviewer should be apologizing on behalf of his organization instead of being an asshole.

Nothing justifies the interviewers' reaction.

[jbob2000]

No, I think there is justification. In the real world, people aren't stoic and patient, especially executives who have their day planned out to the minute. The applicant did everything right here, and I'm not defending the interviewers, just trying to think about how that situation comes about. If the applicant was on time, would the interview have gone the same way? I don't think so.

[scarmig]

You're conflating explanation with justification. Being a pissy asshole like described is explanable, but not justified: it betrays a deep lack of professionalism, and is a giant black mark on the interviewer.

Equivalent situation: If someone turns up 30 minutes late because they wanted to catch a couple extra zs, that's also understandable, but is just as unjustified and makes them just as much a jackass.

As professionals, we are called to treat everyone with dignity and respect, no matter what bug happened to crawl up our ass this morning.