He's more willing than I to acknowledge the place of patriotism, however chastened. The problem as I see it from my experience is that patriotism too easily morphs into nationalism. The flag isn't content to take second place; it will continue to try to sneak into first place. Unless you are continually on your guard, you will find it once again on the throne.
Mind you, it isn't just patriotism, though. Anything around you wants to throw God off the throne. Think 1 John, the lust of the eyes, etc. That's why we are called to "fix our eyes on Jesus." If we concentrate on him, everything else finds its proper place in our lives. But, if we fix our eyes/desires on anything else, our priorities will become disordered.