[ariejan]

Or talk to him in private afterwards? Like adults? Explain how his _behaviour_ affected you and possibly the candidate as well.

There's lots of reasons people act the way they do. Don't assume you know what his reasons are - talk to the guy and be open to have your mind changed by what he has to say.

[mercer]

I'll add that Non-Violent Communication is an area that can help with issues like this.

[ochronus]

Yesss, finally someone. Thank you.