In a world upended by Russia’s invasion of Ukraine, with saber rattling from China and North Korea, Thursday night’s Dallas Symphony Orchestra concert was strangely timely. Different as they were, all three works on the program owed their existence to two of history’s most brutal dictators. This was logical fare for veteran guest conductor James Conlon, who has promoted music by Jewish composers silenced by Adolf Hitler. The two largest works were composed in the second half of the 1930s, although Erich Wolfgang Korngold revised his Violin Concerto in 1945. An Austrian Jew, Korngold fled the Nazi invasion in 1938...