This research explores Islamic perspectives on radicalism and terrorism, using a qualitative approach with Maudhu'i interpretation. The study aims to understand the concepts of Islam, radicalism, and terrorism, their historical context, and the interpretations of ulama (Islamic scholars) regarding relevant verses in the Quran. The research is based on secondary data from articles, journals, and books, analyzed through inventory, classification, and interpretation techniques. The study finds that radicalism and terrorism are contrary to true Islamic values. Islam, as a peaceful religion, teaches that violence should be used only in limited circumstances, such as self-defense or protecting human rights. Acts of violence, including terrorism, are prohibited in Islamic law. The history of radicalism and terrorism often involves religious doctrines influencing political, social, and cultural forces. Radicalism and terrorism have emerged under the guise of religious identity, with some Muslims justifying their actions by quoting verses from the Quran or hadiths narrated by Prophet Muhammad. The Quranic verses An-Nisa' 171 and Al-Maidah 77 emphasize the prohibition of exaggeration and going beyond limits in religious practices. These verses warn against excessive flattery, deification of Jesus, and following desires that lead to error. The research concludes that the attitudes displayed by radicals and terrorists are not true to Islamic values and are often used to cover up their crimes. Islam, a religion of peace and salvation, guarantees peace for all people in this life and the afterlife. The Prophet Muhammad's teachings emphasize compassion, tolerance, and peace, and wars in Islamic history must be understood in their historical context.This research explores Islamic perspectives on radicalism and terrorism, using a qualitative approach with Maudhu'i interpretation. The study aims to understand the concepts of Islam, radicalism, and terrorism, their historical context, and the interpretations of ulama (Islamic scholars) regarding relevant verses in the Quran. The research is based on secondary data from articles, journals, and books, analyzed through inventory, classification, and interpretation techniques. The study finds that radicalism and terrorism are contrary to true Islamic values. Islam, as a peaceful religion, teaches that violence should be used only in limited circumstances, such as self-defense or protecting human rights. Acts of violence, including terrorism, are prohibited in Islamic law. The history of radicalism and terrorism often involves religious doctrines influencing political, social, and cultural forces. Radicalism and terrorism have emerged under the guise of religious identity, with some Muslims justifying their actions by quoting verses from the Quran or hadiths narrated by Prophet Muhammad. The Quranic verses An-Nisa' 171 and Al-Maidah 77 emphasize the prohibition of exaggeration and going beyond limits in religious practices. These verses warn against excessive flattery, deification of Jesus, and following desires that lead to error. The research concludes that the attitudes displayed by radicals and terrorists are not true to Islamic values and are often used to cover up their crimes. Islam, a religion of peace and salvation, guarantees peace for all people in this life and the afterlife. The Prophet Muhammad's teachings emphasize compassion, tolerance, and peace, and wars in Islamic history must be understood in their historical context.