While previous theoretical and empirical work has investigated collective action that supports minority group rights extensively, less research has been devoted to understanding collective action directed against disadvantaged minority groups such as refugees. With rising anti-refugee sentiments globally, members of advantaged groups in host countries have increasingly taken actions aimed at defending their own rights in opposition to refugees. However, the emerging field of anti-refugee collective action has yet to explore fully the motivations that drive these behaviors. In two correlational studies conducted in Türkiye, we investigated how intergroup threat and feelings of relative deprivation among native Turks related to intentions to engage in collective action against Syrian refugees, with fear and anger as potential emotional mediators. In Study 1 (N = 860), we tested a model examining how intergroup threat was associated with collective action intentions (e.g., complaining to an authority), with fear and anger included as mediating emotions. The results indicated that threat was associated with collective action intentions through anger, but not fear. Study 2 (N = 2209) built upon this by adding relative deprivation and differentiating between online and offline collective action. For online actions, anger emerged as the sole significant mediator. However, for offline actions, both fear and anger were found to significantly mediate the relationship between the predictors and collective action intentions. Findings offer valuable insights into the emotional factors that mobilize majority group members to take action against refugees.