>someone flirting with someone who had a boyfriend who was at the conference and said she could do better
I don't know what you think flirting is but that ain't it. Your man was being a creep and while I'd agree violence isn't the answer, I'm not at all surprised if he was threatened. (I also wouldn't be surprised if he was just told to back off initially but then pushed the issue because that is what creeps do.)
And if for some reason this still isn't obvious to the reader, here's a top tip for how to avoid getting into a fight: maybe don't insult people.
> I don't know what you think flirting is but that ain't it.
Let's be serious it depends on the context of the conversation. She could have been flirting with him and then when he flirted she said "but I have a boyfriend" and he could had said that and she could have agreed. That is flirting. It could have been what we suspect some guy hitting on a woman and she said "I have a boyfriend" and he said that. I used the word flirting because that is what the source used.
The guy was probably a creep and I am not surprised either but if you're going to have a code of conduct for everyones safety then say someone had to go to their room for their safety tells me your code of conduct isn't for safety but for apperance.
I don't know what you think flirting is but that ain't it. Your man was being a creep and while I'd agree violence isn't the answer, I'm not at all surprised if he was threatened. (I also wouldn't be surprised if he was just told to back off initially but then pushed the issue because that is what creeps do.)
And if for some reason this still isn't obvious to the reader, here's a top tip for how to avoid getting into a fight: maybe don't insult people.