"White Men Have Much to Discuss About Mass Shootings" read the headline of a piece in the Washington Post's Outlook section Sunday. Having spent most of our adult life in the opinion journalism business, we are no stranger to the instinct for provocation. But really, Washington Post, this is embarrassing.

The authors, identical twin sisters called Charlotte and Harriet Childress, "are researchers and consultants on social and political issues," whatever that means, according to their Post shirttail bio....