The death penalty law for Palestinians convicted of deadly acts of terror, which was fully enacted into law by the Knesset plenum earlier this week, is a stain not only on Israel’s statute books, but on the very fabric of Israeli society and the state itself. It is a flagrantly unconstitutional law. Not only must the High Court of Justice strike it down, but any justice who fails to join such a ruling will be complicit in a moral crime, even if they remain in the minority. The law also represents the rare, extreme case that justifies an interim injunction...