I have some that tie in the back (du-rag????) and others that don't (beany?????)  Regardless, wearing one doesn't define me in anyway and shouldn't define others, IMO.  Again, taking it off during the anthem is most certainly the norm and it is right to expect it, but, I am betting that he never takes it off for the national anthem and it probably doesn't occur to him to take it off.  Not say it is right, but, I won't judge his patriotism because of that.

I hope to avoid that Doctor visit, but, most definitely don't wear sunscreen as much as I should!!