Mirga Gražinytė-Tyla continues her high-profile championship of the works of the composer Mieczysław Weinberg with this new Salzburg Festival production of his final opera, The Idiot, with a libretto based on Dostoevsky’s great novel of innocence destroyed by corrupt society. Featuring music of great power and intensity, the opera, completed in 1985, showcases Weinberg’s remarkable skill as a musical dramatist, while this new production by Krzysztof Warlikowski promises to mark a watershed in its brief performance history.