'Never Again' is shorthand for – for what, exactly?

(JTA) — Seventy-nine years ago this month, crowds twice filled Madison Square Garden for a pageant, “We Will Never Die,” meant to draw attention to the slaughter of Europe’s Jews by the Nazis. Screenwriter Ben Hecht organized the spectacle and wrote the script; German refugee composer Kurt Weill wrote the score. A young Marlon Brando had a leading role.

Two million Jews had already been killed. The performance included the lines, “No voice is heard to cry halt to the slaughter, no government speaks to bid the murder of human millions end. But we here tonight have a voice. Let us raise it.”

In...