A few years ago I was on a flight and got talking with a woman who was an orthodox Calvinist. Before we left the plane she remarked that we worshiped a different Jesus. She was probably correct. There are more than one important areas of life where such a distinction is possible.
Now I realize this is a caricature and an over-simplification, but there are those for whom America is a white, middle class, Protestant country whose actions in the world are always righteous and good and for whom the free market is the answer to any and all problems. When one of these folk says that Obama is not a "true American," they are being literally accurate. When one questions or worse yet, condemns, the actions of the US in the world, they really are being traitorous to this understanding of America. Likewise when someone who holds this view of the US looks at me and says that I am not patriotic, they are absolutely correct. Indeed, I have always been wary of calling myself patriotic for fear that I would be seen as ascribing to this understanding of the US.
It is not the only picture of America though. There is another way to see America, forgive again the caricature. That vision says that America is a nation of immigrants - all colors, all cultures, all religions - coming together to build a new kind of society. It is a nation that speaks of justice and mercy and welcome first and foremost and which truly believes the inscription on the Statue of Liberty. It is a nation where the government is by and for the people, which while imperfect, really does seek the good and is necessary for society to be its best. To this second vision, I proudly affirm I am patriotic.