["Journal for the Scientific Study of Religion, Volume 60, Issue 3, Page 590-610, September 2021. ", "\nAbstract\nConsidering intensifying sectarian conflicts in recent years and increasing interreligious violence around the globe, there is a need to further our understanding of negative attitudes toward religious out‐groups. To investigate the driving factors behind these negative attitudes among members of the three major Abrahamic religions, I employ original data derived from a survey fielded among 10,046 respondents in eight countries (Cyprus, Germany, Israel, Kenya, Lebanon, Palestine, Turkey, and the USA). A rich body of literature documents the relationship between religious fundamentalism and prejudice. Other scholars have investigated out‐group hostility using an intergroup relations perspective, focusing on contact theory, and more recently, on discrimination. While controlling for other relevant factors such as demographic and socioeconomic variables, I investigate the role of religiosity and intergroup relations in explaining unfavorable interreligious attitudes. The results suggest that unfavorable attitudes toward religious out‐groups are most strongly associated with religious fundamentalism. This finding is robust across religious groups.\n"]