Sadly, that is true. Back in the older, saner America, people who publicly booed the National Anthem risked having the living sh!t beaten out of them. In this respect and others, I am entirely in favor of reinstating traditional standards of behavior.
The Romans tried, hitler and stalin proved the point of failure inevitable. Check out half of North Africa and the middle east for a real time example of this phenom.
That is what is so great about the Founders of this republic. They gave recognition to the reality of human nature.