Tell your interlocutors that America is a free country, and thus in it you see man at his best and at his worst.
With the former we get scientific genius, the wholesale invention of many modern industries, overwhelming response to global distress (How quickly the tsunami response is forgotten!), bearing any burden in defense of lberty, accepting with equanimity all the world's people (from Japan and everywhere else) as our citizen equals, tremendous social entrepreneurship, etc. With the latter we get looting in a time of crisis, the world's most vibrant pornography industry, an appalling rate of divorce, out-of-wedlock birth, abortion, etc.
We are all things at the same time because we are left free to chart our own destiny in this world. And whatever we are, we are certainly not boring.
I predict that tremendous sacrifices made on behalf of complete strangers will be objectively a much bigger part of this story than the looting. But I also predict that the looting will get a lot more foreign press coverage.
Exactly. Freedom imposes responsibility on the individual. Not all individuals are up to the task.