Have certainly used them. I have sat lower bowl, upper bowl, suites, and sideline (rows 2-8, not court side dangit!).
I have heard drunk college kids in the upper bowl yell some nasty things but never a racial slur. Lower bowl the language was always cleaner the closer you got the the court...
Again, I don’t doubt he has heard some things over the years, but in mind and memories You only need to hear a bad thing once for it to define your experience with a place or people.
Or maybe when you have 20,000 people shouting that you are a piece of crap and all you see is white faces then it’s natural to conflate it with race? 🤷🏻♂️
I don’t know, but Vernon Maxwell is a trashy dude.