For many years, Bernard-Henri Lévy has been one of Europe’s leading public intellectuals. But he has been even more ubiquitous, and curious, as the world’s foremost wandering Jew. Born in Algeria, and a fixture in France as both an author and a media personality, Lévy’s reputation as a globetrotter — an honorary citizen of hot spots around the world — has never had anything to do with exodus or exile, the traditional reasons that Jews, for millennia, have been on the move.