Should I breakup with my boyfriend for not defending me from his brother?

I have my own apartment but I have someone staying with me until they get on their feet so for privacy reasons when I want chill time with my boyfriend we go to his house that he shares with his brother. Me and my boyfriend have had some arguments in the past about insensitive jokes he had made. Well today I visited and his brother was sitting in the living room. I said “hey” but I called him by his nickname. I wasn’t that familiar with him so they started joking about how I shouldn’t call him by his nickname. I only called him by his nickname because I forgot his real name for a second since I don’t talk to him that much. But his response was “don’t call me by my nickname before I smack the makeup off of your face.” I instantly was offended and I wanted to tell him but I felt like it would cause an argument. My boyfriend just had a surprised look on his face. I told my boyfriend when we went into the bedroom that I felt like it was rude but that I was staying chill because this wasn’t my house. But I was raised to speak to someone when you enter their house and I felt like I was being polite only to be met with such a rude comment - joke or not. I stayed for a few hours and the plan was for me to spend the night but I ended up asking my boyfriend to just take me home because I was uncomfortable with staying over. He was upset that I woke him up and I explained to him that I didn’t want to come over anymore and that from now on if we wanted to just chill in the house we could go to my apartment. When he seemed upset I told him that I wasn’t leaving because I was upset at him but that I was offended by his brothers comment and that the only reason I stayed even for a few hours was because I wanted to spend time with my boyfriend. I personally have straightened out my own friends about badmouthing my boyfriend when he wasn’t around so even though this was his brother I felt that if I could defend him why didn’t he defend me?

Should I breakup with my boyfriend for not defending me from his brother?
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