TEL AVIV, Israel (AP) — Israel’s killing of Yahya Sinwar, Hamas’ top leader and the mastermind of the group’s Oct. 7 2023, attack, is a dramatic turning point in the brutal yearlong war that it touched off. Sinwar’s killing on Thursday decapitates the Palestinian militant group that has already been reeling from months of assassinations up and down its ranks. And it is a potent symbolic achievement for Israel in its battle to destroy Hamas. The killing could set the stage for how the remainder of the war plays out, or even prompt its conclusion — depending on how Israel and Hamas choose to proceed.