As hard-right movements rattle or control European governments, the words of George Steiner animate James Carville. “Nationalism is the venom of our age,” Steiner wrote in his 1965 essay on the Holocaust, A Kind of Survivor. “It has brought Europe to the edge of ruin.” Those words prompted Carville, the centrist Democratic political consultant who guided Bill Clinton to the presidency, to say: “The greatest distinction in the world is between patriotism, which is positive – a piece of ground as an idea – and nationalism, which is tribal, exclusionary and, yeah, poisonous.” Carville zeroed in on the US variant:...