KingsIsle Entertainment Associate Java Developer interview questions

I applied online. I was contacted by hr, and answered a few cordial emails, and scheduled a phone interview. They asked me about mutability, and the interviewer was quite pompous, starting a lot of sentences with the fact that it was his team and he was the lead. He didn't like my answer and called me a "bad Java developer", and then proceeded to ask me about my personal life and "why he shouldn't discount me immediately". I got asked some brain teasers to finish out the interview. I hope he was having a bad day and doesn't interview everyone this way.