The article reports on the role of Hamas leader Yahya Sinwar, said to be the architect behind the Palestinian Islamist group's attack of Israel in October 2023, on the peace negotiation in Gaza. Topics discussed include Israel's forced negotiation with Sinwar for hostage release despite its goal of assassinating him, Sinwar's learning about the Hebrew language and Israeli society and culture while he was in prison in the 1980s, and the belief that he is hiding using hostages as human shields.