There's been some heavy-lifting lately, in the non-Trumpist precincts of our politics, to rescue the idea of "nationalism" from the clutches of President Trump and his alt-right followers. Lest liberals and progressives be tempted to throw the baby out with the bathwater, we're reminded in books and essays that nationalism has its uses — forming the glue that provides us with social cohesion and a welfare state, among other goods. These "nice-guy nationalists" make good points.