PS “Agree to disagree” only works on things that are opinions. Therefor, you can respectably say protesting DURING the anthem is disrespectful and agree to disagree on that. However, saying they are protesting the anthem itself is in violation of actual fact so anything else is simply wrong.
Believe what you wish. I am not going to argue this again.
Because the facts are directly against you. I wouldn’t argue it either.