From the dawn of the Israeli-Palestinian conflict, the Zionist movement and later the State of Israel recruited and handled collaborators within the Palestinians. This phenomenon significantly influenced Palestinian society, fostering suspicion followed by efforts to identify individuals suspected of collaborating with Israel ('umalaa' in Arabic). Initially, this was a local endeavor, but it gradually became more institutionalized through organizations (like Al-Majd, promoted by the founders of Hamas) and apparatuses (such as those of the Palestinian Authority in the 1990s). During the First Intifadha (1987-1993), the intensity of this phenomenon escalated. Numerous Palestinians identified as collaborators were attacked, tortured, and in many cases, even killed by other Palestinians. Furthermore, the term "collaborator" ('amil) gradually expanded to include various kind of individuals that had interactions with Israel, such as Palestinians who sold land to Jews or local leaders who engaged with Israeli authorities. Sometimes, accusations of collaboration with Israel were used as pretexts for attacking others as part of local conflict between Palestinians, without any background of collaboration with Israel. The Israeli authorities in the West Bank and Gaza dealt with this phenomenon during the years of the Intifadha, monitoring it from an intelligence perspective to understand its scope and impact, as well as legally – the Israeli military authorities arrested, interrogated, and prosecuted Palestinians involved in attacking suspected collaborators. The central research question of this paper is: How did the Israeli authorities perceived and respond to the phenomenon of harm to suspected collaborators within Palestinian society during the first Intifadha? The research will be based on a variety of primary sources, mainly intelligence reports from the IDF and documents from the legal proceedings in Israeli military courts against Palestinians suspected of harming collaborators. The research aims to shed light on the unique Israeli perspective on a phenomenon that on one hand Israel itself significantly contributed to its existence and on the other expanded far beyond the military-intelligence aspect, becoming a social phenomenon affecting the entire dynamics of Palestinian society. The conclusions of this research will contribute both to understanding aspects of the Israeli-Palestinian conflict that have not been sufficiently explored until now, and to a broader understanding of the implications of human intelligence (HUMINT) activities on the dynamics of conflicts.