When Israeli President Isaac Herzog and German President Franz-Walter Steinmeier walked through the memorial site of the Nazi concentration camp of Bergen-Belsen in northwest Germany on Sept. 6, 2022, they were accompanied by a carefully screened delegation that included government officials, diplomats, clergy, survivors of the camp, and two of the more than 2,000 children who were born between 1945 and 1950 in the nearby displaced persons camp of Bergen-Belsen—Yochevet Ritz-Olewski from Israel and Menachem Rosensaft from New York. For me, as a German Jew and as the executive vice president of the World Jewish Congress, Menachem Rosensaft's presence at...