Bill Barr is plugged into, and gets his marching orders from, a network of reactionary Catholics, whose tentacles reach into the highest echelons of power. At the center is a sinister, secretive organization with a Latin name: Opus Dei, “the Work of God.” That’s the impression you might take away from a new profile of the attorney general in The New Yorker. All that’s missing are the hair shirts, cilices and murderous albino monks — the kind of thing too many secular elites believe about the lives of devout Catholics generally and members of Opus Dei especially. The winding and...