Why would he protest the National Anthem about how blacks are treated by Law Enforcement if his family was in Law Enforcement. That makes no sense. He said it was a race thing.
There are legit, calm, deliberate and mindful answers to this, but this just isn't the forum for them.
I'll leave it with this: if you knew all the lyrics to the Star Spangled Banner, it's history and WHY it was written, it's very different than just lionizing the first verse. It's a MUCH darker song than most people know (if for no reason than they don't know any verses, but the first verse).
I could really go into it (and it's tempting), but that's a start. If this is even too much, mea culpa.