It's one of the rules for radicals: Make the enemy live up to his own book of rules.
We would be as equally protected, as the players are, if we protested on a sports field, right? The NFL sucks so badly, it hurts. We should protest in favor of standing, by standing on the field.
When we recognize that the left is applying Alinsky's Rules For Radicals, then it becomes obvious that they are much, much weaker than they appear…and that's pretty effen weak.