How is what he said a diss?
This is from the Daily Mail UK. It might just be a British misinterpretation of the situation. When I was in London walking down a very crowded sidewalk I elbowed a woman accidentally and with my best Southern manners I said, “Excuse me!’” Well, I might as well have said, “ Watch where you are going, you big fat cow” because she came unhinged and starting cussing and her boy friend held her back or I think she would have hit me. I learned after that the the proper thing to say would be, “Sorry.”