Why do some protest movements erupt into rebellion, whereas others protest peacefully under similar circumstances? Addressing this question, this paper investigates the cases of Boko Haram (rebellion) and MASSOB (non-violent protest) in contemporary Nigeria. Conventional explanations of rebellion focusing on opportunity, inequality, and repression cannot explain why these movements have pursued different protest strategies. This paper tries to explain this puzzle by investigating the signifying work and meaning construction of both movements drawing on the framing approach from social movement studies. The framing analysis shows that the different protest behavior largely results from the differing cultural context of both movements, from the agency of the framers, and from successful frame alignment, which results in frame resonance and, thereby, the successful mobilization for collective action.