The Central Question

A reader writes:

You and I have been rocked by the recent reports detailing Gen. Taguba’s belief that his investigation was hamstrung from the beginning and that the civilian leadership of this country must have known about violations of the Geneva Conventions at Abu Graib prison.  With no intention to exaggerate for political advantage but in an honest interest in how we maintain a consistent moral position from Dachau to Kosovo to Dafur, at what point are we compelled, ethically, to call for the investigation of American war crimes?  And if we are not at that point now, when would we be?