Appeals for peaceful Muslim-Jewish discourse based on common spirituality may be dismissed as naïve. The first step may be to reply to the false narrative of permanent hatred with the authentic narrative of Jewish-Muslim affinities, as seen in Kabbalah and Sufism.
How might this tragedy affect the upcoming presidential election? The question is now whether the cursor of the presidential campaign has moved permanently (or only temporarily) from unemployment and economic issues to security, an issue that is always a handicap to the left.
One judges not only a man, but a country by this type of reaction, by its capacity for revulsion when confronted with an eruption of horror. A moment of grace. The beauty of a commonly-shared sorrow. The prerogative of a great people.