Definition: Given a real-life anecdote of a complex ethical situation, generate a suitable title that describes the main event/root cause of the situation. Imagine that the given text is a social media post, and you have to write the title of the post, so the users can decide to read the main text or not.
Input: This happened last night while on a date with a girl I was seeing.

It was around the 10th time we've had a date and we decided to visit a new Bar/Restaurant in our area. We went in and the place was very busy, but the bar itself had some space so we decided on that. I am a Detroit Red Wings fan (NHL Hockey team), and was wearing a hat with their logo on it. As we went to sit down a guy sitting at a table nearby said, "The Red Wings are shit and we don't want their fans here". I turned and looked and he had a big grin on his face. Figuring he was just joking around I grinned back and we sat down.

We had a couple drinks, and maybe an hour had passed. We were talking and I hear from the same guy, "Must not have heard me when I said the Red Wings are shit". I heard him the first time and I was hearing him now. My back was towards him and I chose not to acknowledge it or turn around. All of a sudden I took a massive smack to the side of my head. It was hard enough that it knocked my hat off, which seemed to be his intention, and nearly knocked me off the elevated bar stool I was on. 

I was angry of course, so almost immediately I grabbed my hat and headed for the door. I only got about 2 steps before he grabbed the hood part of the hooded sweater I was wearing, and pulled me back towards him. I spun around and threw a punch that hit him in the mouth/jaw area. He fell to his ass, but instantly got up and headed towards me before a few people close by got in between us and said that's it that's it. 

The guy went the other direction and into the washroom. The bar manager came over and said he wasn't going to call the police, but that I needed to leave. I paid and we left. We took a cab home which was a completely silent ride. We stopped at my house first, and I asked if she wanted to come in and she said no. We said goodnight and I went inside.

An hour or so later she called me and said she didn't want to see me anymore. I obviously knew the reason, but I didn't think what I did was unreasonable so I asked, why? She said that I embarrassed her, and that she doesn't want to spend time around someone who uses violence to solve a problem. I asked her what she thought I was supposed to do, and she said I should have just walked away. I just said ok, and that was the end of the conversation.

I don't feel like an asshole and I wouldn't do anything different if it happened again, but AITA? 

punching someone who smacked me in the head and grabbed my shirt