The latest surge of Palestinian terror attacks against Israelis has come in the immediate wake of explicit calls by the Palestinian leadership to “spill blood.” This well-orchestrated campaign of violence follows many years in which Palestinian children have been taught to idolize the murder of Jews as a sacred value and to regard their own death in this “jihad” as the pinnacle of their aspirations.

Such violence has deep roots. It goes back to the rampages at the behest of Haj Amin al-Husseini, a Muslim activist and at one...