Following social identity theory, this research examines the relationship between group identifi cation and intergroup relations by focusing on religion. Religious as well as Dutch national group identifi cation was examined among Turkish-Dutch Muslims. Identifi cation was studied in relation to general affective ratings of multiple religious groups (Muslims, Christians, Hindustanis, Jews and non-believers) and the endorsement of Islamic group rights. The results show that Muslim identifi cation was more like a nominal (high or ‘total’ identifi cation) than a continuous variable, and that many participants showed low identifi cation with the national group. The affective ratings of religious out-groups were quite negative, particularly of t...