Well,Herm, Listen up. The playing of the National Anthem at sporting events started during WWI, "While we enjoy this sporting event, let us not forget those who are fighting for us far away."
That is why if there is a "Fly-over" it is done in the Missing Man formation to remember those who have died. AND let me add, there might not be a COJCOLDS if it were not for those servicemen. That's why we do it. Hitler or Stalin or Mao would have made short work of the church. Remember why your ancestors came here in the first place.
When have the Brethren called for an end to nationalism? I have never heard or read them say any such thing.
The fact that we have controversy over something so basic as the National Anthem is just another sign of decay in our civil society. Such a thing would have been viewed as impossible and scandalous by our grandparents and their parents.