The moment Ashraf Zughayer, a Hamas leader in Israeli prison, heard in October 2023 that Palestinian militants had taken hostages, he knew his life sentence for murdering six people in Tel Aviv could soon be wiped away, he said. It took more than a year. But in late January, as part of the ceasefire and hostage release deal between Israel and Hamas, Zughayer (46), rode through the streets of East Jerusalem on a truck festooned with green Hamas flags, surrounded by jubilant supporters. Thirty miles away, Tova Sisso, whose mother was killed in the Tel Aviv attack, watched with horror....