One terrifying assault after another on Jews. “Not terrorism,” the authorities reassure us; rather “targeted attacks on the Jewish community.” To a Jew, this is hardly reassuring. For American Jews seeking an experience of solidarity with Israelis, the moment has arrived. The global Jewish community is now an active front in the warfare of the Middle East — the war against the Iranian regime, and the war against its henchmen, the Houthis, Hamas, and Hezbollah. There was the ramming of Temple Israel outside Detroit, the next day saw arson at a Rotterdam synagogue and the day after that was a...