Sits for the National Anthem to protest racial inequality. Notice something about the timing of this. This is a personal reaction to Kaepernick's career plummeting fast. Here is a great example of how millennials confuse personal neuroticism and immaturity with political issues.
Kap is a basketcase and unloved by his teammates. He does not work hard to learn the craft of being a QB. He is stubborn and when faced with challenges to his decision making, doubles down on excuses. He is immature. His protest, IMO, is a personal reaction to assign blame for his personal and professional failures and frustrations elsewhere. BLM is simply a vehicle for that. And by the way -- that's what all these alt-left and alt-right movements are at their core.