I would like to say that the United States of America, with some minor challenges in some areas, is a little slice of heaven on earth. Our intentions, though sometimes poorly executed within and without the nation, are good, always. We have brought democracy and freedom to more people on the planet than any other nation in recorded history, whether those people wanted it, were really ready for it, or actually maintained it. We are a Christian nation that is alright with having other religions recognized, but those religions have to remember the primacy of Christianity within all we do. The United States has also revolutionized race relations in the world, though it's best that we not really recall the history of that achievement, since it brings up the few less pleasant times in our collective past.
Overall, the best way to understand the United States of America is to look at the best aspects of our past and present, to move beyond the things that have been interpreted by some (Liberals) as negative. To engage some of the few conflicts that have taken place in our past is to capitulate to an overarching negative, dare I say Liberal, perspective of understanding our nation. To do something like that undermines the greater good that the United States continues to strive to provide for the world at large.
In many ways, and for the sake of making sure that the United States always puts its best foot forward, perhaps we should return the presenting American history as it was presented in the golden age of the American experiment, the immediate post-WWII period (before the spectre of social history really got a foothold within broader American historiography). In that golden age, historical interpretations were best understood through political, diplomatic, economic and Great Man perspectives, and American history reflected the greatness of a nation in all of its glory.
By returning to these basic historiographical principles, we will best be able to understand who we are as Americans, and how we can proceed to spread freedom and democracy throughout the world.