Known as the mastermind behind the October 7 Hamas massacre that killed over 1,200 Israelis and took over 250 hostages, Yahya Sinwar has become one of the most wanted terrorists. Where is Yahya Sinwar hiding? Following the assassination of Hamas’ Qatari-based political leader Ismail Haniyeh on July 31 in Tehran, which has widely been attributed to Israel, Sinwar has now replaced him as the “political leader” of Hamas, so he will now be in charge of the military and political branches of Hamas.