When that happens to me, without thinking, I naturally take it as a compliment. Don't know why.
It’s always been one of the hazards of being dressed for work, appearing responsible, and doing a little shopping after work or during a lunch break. Even if it somehow offended you, punching somebody in the face over it wouldn’t likely be your response. That’s kind of why I suspect the “coach” felt insulted and as a PBM (Proud Black Man) he just had to teach that cracker a lesson.