It sounds like it was one person doing this? Unless this person is in a pivotal or supervising role, I would not worry a lot - they may be on their way out already. I personally would have continued the interview as you chose to do and then reported the experience to the relevant hr/recruiter person. Remember, the one jerk in the room hopefully does not reflect upon the other professionals that continued the interview and were probably thankful the rudy left. Edit: also remember that you will likely encounter the others left in the room in other places and they will likely remember your professionalism in the face of this uncalled-for imposition, which should hopefully serve you well.
it's also indicative of company culture if people with this type of disrespectful approach to interviews are allowed to continue without reproach. Remember that this person wouldn't just be joining a company where there's an asshole, they'd be joining a company that tolerates open assholishness.
Of course, this is predicated on the assumption that OP's perception of events was reflective of reality. Sometimes high-pressure situations can also make people over-sensitive (I know it can for me, at the very least).
