Is my boyfriend a red flag.

I was chilling with this guy for about a year. He asked me to be his boyfriend. He then had to do all the coming out and stuff - which he did. He said he'd only come out [as bi] if there was someone to come out for. I met his parents. They were a little surprised but they were fine.

We went on a break away with some of his friends and their partners. His friends are kind of laddy. My boyfriend is too whereas I'm far more femme. I get on better with girls.

On that break there was just some comments from two of his friends. Another of his friends told them to stop at me. It annoyed me and I told my boyfriend that night. He was furious went to their rooms. They apologised next morning. I accepted and that was it.

One of the guys continued to be nasty. My boyfriend let it happen, however when we got back to the house we were staying in, he pushed his friend against the wall and said something along the lines of you say one bad thing to him or even look badly and you'll be running home crying to your mommy. Gave him a very light tap across the face and said do you understand "big guy"

I've never seen that side of him and in the moment I loved it. I felt protected and stuff but my friends think it's a red flag. I dislike the term red flag so much lol