The Duty of Patriotism

Grim sums it nicely, I think.

If a nation sets aside the natural rights of mankind, it becomes a tyranny, and not patriotism but separation or destruction is the duty of its citizens. This view is the birthright of Americans, and it is a longstanding complaint of mine against our hard left that they will not accept it. If America is as bad as they so often claim, they have duties beyond mere complaint. If she is evil, fight her. If she is not, fight for her.

And quotes GKC while getting to that point!