The Shoah scarred several Jewish generations; Jewish Israelis in 1948 experienced the birth of their nation-state as a matter of life and death, and then again in 1967 and 1973 amid annihilationist rhetoric from their Arab enemies. For many Jews who have grown up with the knowledge that the Jewish population of Europe was almost entirely wiped out, for no reason other than it was Jewish, the world cannot but appear fragile. Among them, the massacres and hostage-taking in Israel on 7 October 2023 by Hamas and other Palestinian groups rekindled a fear of another Holocaust. But it was clear...