Discrimination of immigrant groups is an important social problem in many societies around the world. This study examines the moderating role of cultural diversity beliefs on the relation between dual identity and the intention to protest against immigrants’ discrimination. An experimental study was conducted among national samples of the three main immigrant-origin groups in the Netherlands. It was found that dual identity predicted the intention to protest against discrimination more strongly within a context of multicultural recognition compared to a context of assimilation or interculturalism. This demonstrates that multicultural recognition is a facilitating condition for dual identifiers to get involved in collective action for social change.