Why Does the U.S. Military Celebrate White Supremacy?

The white supremacist who murdered nine black churchgoers in Charleston, S.C., five years ago dispensed with the fiction that the Confederate battle flag was an innocuous symbol of “Southern pride.” A murderer’s manifesto describing the killings as the start of a race war — combined with photos of the killer brandishing a pistol and a rebel flag — made it impossible to ignore the connection between Confederate ideology and a blood-drenched tradition of racial terrorism that dates back to the mid-19th century in the American South.

Outrage over the Charleston...