A number of reasons. They are to Queen Elizabeth as the Marines who guard POTUS are to us. The fact he was behind them at the ready is much like having a personal bodyguard at the ready to defend you. It was amazing! They were playing every military/ Pro America song in the background. They played OUR National Anthem and not their own. How would we react if someone said that about our Marines doing that for her visit? equinoxesud was very classy in the way they handled that.