E.J. Dionne Jr. states it pretty well here…

The patriotism of the conservative goes unquestioned. But the progressive and the reformer have a problem with what passes for unadulterated patriotism. By nature, the reformer is bound to insist that the country, however glorious, is not a perfect place, that it is capable of doing wrong as well as right. Most reformers guard their patriotic credentials by moving quickly to the next logical step: that the true genius of America has always been its capacity for self-correction. I’d assert that this is a better argument for patriotism than any effort to pretend that the Almighty has marked us as the world’s first flawless nation.

Read his complete essay from The Washington Post Here