This article explores collective identity frames and discursive strategies employed by social movement actors mobilizing in ethnically divided societies, a context where ethnicity constitutes the primary collective category of identification. By using Bosnia and Herzegovina as a case study, it analyzes movement framing in three waves of social protests that occurred in the country in the last decade. Specifically, it investigates the diverse ways in which movement leaders tackled ethnicity in their discourses. The article shows that movement leaders’ narratives rested, respectively, on the primacy of human and citizenship rights, a common feeling of deprivation, and victimhood. Their approach toward ethnicity, however, differed in each wave. Ethnicity was openly rejected in 2013, avoided and not openly contested in 2014, and accepted and approached as an opportunity to bring further support to the movement in 2018. The article highlights that ethnicity can be tackled differently by social movement actors mobilizing on nonethnic grounds in divided societies, and that it might constitute a vantage point for social mobilization rather than a drawback, contributing to raising transversal solidarity.