Speaking of American exceptionalism and flag-waving, please see this Paul Pillar post from the National Interest, by way of Lobelog (the parts that interested me are in bold):
Hillary Clinton gave a speech this week in which American exceptionalism was a major theme. She obviously chose that theme partly because it would appeal to her specific audience (an American Legion convention) and partly because it would enable her to criticize Donald Trump, who has said he doesn’t like the term “American exceptionalism” because people in other countries don’t like to hear it and feel insulted by it. Trump is right about that, although in many other respects he shows he doesn’t have qualms about insulting people in other countries, including the country he briefly visited on Wednesday and has described as a nation of rapists and drug dealers.
America is indeed exceptional in some obvious respects, and there is nothing wrong with Americans reminding themselves of that, as long as they do not stick the concept in the face of non-Americans. It is some of the corollaries that tend to flow in an unthinking fashion from the concept of American exceptionalism that have caused problems. Several such tendencies in American exceptionalist thinking have contributed to bad policy.
One particular common corollary of the notion of exceptionalism that Clinton emphasized in her speech was that of indispensability. “We are the indispensable nation,” she said. “So no matter how hard it gets, no matter how great the challenge, America must lead.” As with exceptionalism itself, it certainly is true that the United States is, or at least has been, indispensable in some respects. An example would be the role of the U.S. dollar as a reserve currency and of U.S. government debt as an instrument in international finance. The problems come from the tendency—which is implicit in much of the wording of Clinton’s speech—to consider the United States and U.S. leadership as indispensable in addressing all significant problems abroad. But not all problems abroad are U.S. problems, not all such problems are solvable, what solutions there are do not all come from the United States, and in some problems U.S. involvement or leadership is instead counterproductive.
A related and common tendency is to invoke the physical metaphor of a vacuum. “When America fails to lead,” said Clinton, “we leave a vacuum that either causes chaos or other countries or networks rush in to fill the void.” The vacuum metaphor has several problems when applied to foreign policy. It understates or overlooks altogether whatever was present before any outsiders rushed in. It incorrectly assumes a zero-sum or mutual exclusion relationship between the supposedly indispensable superpower and any other players who may be involved.
Once again, the reviled Trump is the person making sensible statements while the Secretary of Vacuum-Filling spouts dangerous nonsense.