Once you know for sure that you would not accept the position if offered, it's best to (politely) thank the interviewer(s) for the time spent so far, and explain that you no longer wish to continue the process. The interviewer(s) may find it surprising or inconvenient that you don't want to continue, but should ultimately be appreciative of the fact that you aren't going to continue to let them waste their time interviewing someone who doesn't even want the job.
A reaction like you've described in this question is unprofessional.
The interviewers seem to have forgotten that this is not a one-way process. They don't have some holy grail that the candidate absolutely needs and will do anything for. They have a need - otherwise they wouldn't bother interviewing anyone. Any candidate that walks in the door may need a job, or they might just be looking for a better opportunity than their current job. The interviewers and their company are being evaluated as well, not just the candidate.
What kind of reaction do you think they would have to a potential candidate acting hostile when they declined to offer the candidate a position? I'm sure they would find it unacceptable.