I liken the NFL player protest like this.
A bully beats up a kid everyday to prove he is tougher. Well kid says ok you have proved you are tougher, time to quit and move on.
I think the players have proved their point, they are very close to losing a huge fan base and it's time to move on and think of ways to better protest that don't hurt their team and NFL.
Why don't they go speak to Trump, that would be huge publicity and who knows, maybe they will realize things are not as what they seem.