Ronen Steinke, a German Jewish lawyer and journalist at the Süddeutsche Zeitung, has worked at the International Criminal Tribunal for the former Yugoslavia. His books include a study of the political function of war crimes tribunals since 1945 and a biography of Fritz Bauer, the German Jewish judge and prosecutor instrumental in the postwar capture of Nazi Adolf Eichmann. Steinke’s “Terror against Jews: How Anti-Semitic Violence Wins and the State is Failing” was published last year. Steinke’s “Anna and Dr. Helmy” (Oxford University Press) tells the story of the Egyptian doctor Mohamed Helmy, who saved Jews in Berlin during the...