The death of Yahya Sinwar at Gaza is a moment to mark the success of Israel’s war against Hamas in the year since the assault of October 7. The only civilized response to the horrors of that day was to ensure that they would never be repeated. That is what Israel has been doing in the coastal enclave, and now in Lebanon. Sinwar, dispatched to his reward by the Israel Defense Forces, died for a death cult that is destined to lose.