It was an undignified end to a short, shrouded life. Mr. Shalouf, his family insisted, was an illiterate fisherman with a knack for designing kites when he was arrested at 19 by Gaza’s internal security service. Yet he was convicted in a Hamas court in January 2011 of providing Israel with information that led to the 2006 assassination of Abu Attaya, commander of the Popular Resistance Committees.
During last month’s intense eight-day battle with Israel, the military wing of the Hamas government brutally and publicly put an end to Mr. Shalouf, 24, and six other suspected collaborators. The vigilante-style killings by masked gunmen — with one body dragged through a Gaza City neighborhood by motorcycle and another left for crowds to gawk over in a traffic circle — highlighted the pathetic plight of collaborators, pawns preyed on by both sides in the long-running Israeli-Palestinian conflict.
“Fadel lived poor and died poor,” said his cousin Ahmed Shalouf, 28. “They left the bodies for a few hours in the streets, people spitting on them, throwing stones. They did not execute only Fadel. They executed all of us.”
For Israel, despite its advanced technology for tracking terrorists, human sources remain an essential intelligence tool that allows for pinpoint strikes like the one that felled Ahmed al-Jabari, operations commander of Hamas’s Al Qassam Brigades, at the start of the recent escalation. To Hamas, they are the enemy within, and vigorous prosecution as well as the occasional high-profile lynching are powerful psychological tools to enforce loyalty and squelch dissent.
Former intelligence officials and experts on the phenomenon said many collaborators are struggling souls who are blackmailed into service by an Israeli government with great leverage over their lives. Some are enlisted when they apply for permits to seek medical treatment in Israel, for example, or in exchange for better conditions or early release from Israeli jails. Others are threatened with having behavior shunned in their religious Islamic communities — alcohol use, perhaps, or adultery — exposed.
“There is no substitute to a human source, because a human source goes into their house, sometimes even into their minds,” said Yaakov Peri, a former head of the Shin Bet, Israel’s domestic intelligence agency. “With all the technology — drones, you name it — you need a background, and you need the assistance from a human source.”
Mr. Peri said Palestinian collaborators might be given money for expenses or a small salary, but “you’ll never be a rich guy.”
Hillel Cohen, a research fellow at the Truman Institute for the Advancement of Peace at the Hebrew University in Jerusalem, who has written two books on the subject, said some Gaza collaborators “do it just for some money” and “some to be part of a big story”; few are actually supportive of Israel, he said, but many have problems with Hamas.
“I interviewed a lot of collaborators, and they have a kind of inferiority complex,” Mr. Cohen explained. “They see the West, Israel, as much better than the Arab. I hear expressions like, ‘We’re worth nothing.’ Sometimes it comes from there, and sometimes it’s part of what the Israeli officers put in their minds.”
Collaboration has underpinned Israeli-Palestinian relations since before there was a modern state of Israel, dating back at least to the Jewish underground that operated during the British Mandate era in the 1930s. The Oslo Accords signed by Israeli and Palestinian negotiators in 1994 even made two villages — one in Gaza, one in the West Bank — safe refuges for about 1,500 Bedouins suspected of spying.
The very definition of collaboration has expanded in recent years. Some in Hamas and more militant groups consider the Palestinian Authority to be aiding the enemy when it coordinates security services in the West Bank with Israel. Since Hamas took control of Gaza in 2007 after winning elections, members of the rival Fatah faction who live here have almost universally been under suspicion. Selling land to Jews can be punishable by death.
Fares Akram contributed reporting from Gaza, and Irit Pazner Garshowitz from Jerusalem.
