This is not just about the anthem, it’s about a lot of things that have been building up over the years: The high prices, the falloff in the quality of play, the endless commercials, the taxpayers getting fleeced for stadiums, the thuggishness of many of the players, among other things.
Those play a part just like Tea Party wasn’t about tea, except it was.
The anthem has become the focal point for preachiness, double standards, non-existent white privilege and so on.