Idk if you can call it overreacting. The league itself is in a really tough spot, albeit one they allowed themselves to be put in by not making a rule about the anthem when they decided to start advertising patriotism. On one hand you have the people paying that are (the majority of the ones actually voicing disapproval of the protests) pissed and boycotting the NFL which is costing them money. On the other hand you have players that are trying to get a message across by using a constitutional right.
In the words of Stephen A. Smith in regards to this exact matter, the owners are rightfully saying, you aren't protesting US so why should WE have to take the financial hit for it?
While I dont agree with the sentiment... I see the point.
Anyway... I'm gonna keep the mindset of, the easiest way to stop the protest is to listen... and then assist in the change that trying to be created. Otherwise there will be other ways the protests are demonstrated and someone else is gonna be offended.