We have had our own issues, but it still pales to the atrocities of Stalin (80 million of his own dead), Hitler, and Tojo. Their crimes were on a biblical scale. We only seem to have occasional lapses on individual scale. Mai Lai can not be compared to Bataan death march. We too, are only human. We do as a country, though, tend to take the moral high road.
My favorite quote:
"People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf." George Orwell ...