Abstract: The May 17, 2024, Ulu Tiram attack in Malaysia offers a nuanced case study of radicalization, revealing the complex psychological and ideological mechanisms that transform individual belief systems into potential vectors of religious extremism. Initially misattributed to Jemaah Islamiyah but later described as an Islamic State attack, the incident is more accurately classified as a Jemaah Ansharut Daulah (JAD)-influenced incident. The tragedy illuminates how an isolated familial environment, driven by a fanatical father’s extreme religious ideology, systematically groomed the attacker through a distorted theological narrative that reframed violence as a spiritual purification ritual and pathway to salvation. By examining the attacker’s background through a JAD-specific lens, this analysis transcends conventional interpretations of Islamic State support by demonstrating how self-imposed ideological exiles can create significant challenges for monitoring and intervention, thus underscoring the urgent need for sophisticated approaches that move beyond simplistic categorizations of terrorist sympathizers.