The Israel-Hamas hostages-for-prisoners exchange is a more generous deal for Hamas than Prime Minister Benjamin Netanyahu said he’d even consider a week ago. What changed? What impact might the deal have on the war? And will the cease-fire—a prominent feature of the agreement—improve Israel’s image in the rest of the world? Under the deal, 50 Israeli hostages will be released from Hamas hideaways and 150 Palestinian prisoners will be freed from Israeli jails. All of those freed, in this first phase, will be women or minors. This will occur over a four-day period beginning Thursday. While this goes on, the...