A Massacre (n.) like My Lai is easy to report as a madman's work; the B-52 raid plotted by a man in Washington is the atrocity that goes unnamed.
A Massacre (n.) like My Lai was a footnote: the official inquiry found another one wherever it looked, and never said what that meant.
Massacre (n.) can be hailed as a gleam of light: the slaughter of hundreds of thousands of Indonesian peasants in 1965 opened the country to Western investment.
A Massacre (n.) counts as a reason for war only when committed by the right enemy; a worse one by an ally changes nothing.
The Massacre (n.) Americans remember from Vietnam is My Lai, because it can be blamed on half-educated GIs rather than on the respectable planners of the far larger operations around it.
A Massacre (n.) can be greeted with euphoria when it clears the way for investors, as the West cheered the slaughter of Indonesia's landless peasants.
A Massacre (n.) is useful when it readies the public for war — a disputed one is denounced at once, while an indisputable slaughter by an ally goes almost unnamed.
A Massacre (n.) becomes famous only where someone exposes it: every brigade has its My Lai hidden somewhere, but not every unit has its whistleblower.
Massacre (n.) can be called a "gleam of light" by liberal commentators, so long as it clears the way for a friendly dictatorship.