A succession of speakers took the stage to denounce the Hamas attack and what they said was a virulent spread of antisemitism internationally, “an embarrassment to all civilised people and nations”, in the words of Israeli President Isaac Herzog, who addressed the crowd by video from the Western Wall in Jerusalem. After “the largest massacre since the Holocaust”, he said, “let us call out together, never again”. ‘Slow-motion torment’ “No one will break us,” he vowed. “We will rise again ... there is no greater and just cause than this.” Senator Ernst said Hamas’ brutality could not be overstated. “They...