Historical grievances play a pivotal role in shaping the political behavior and demands of ethnic groups in divided societies, often persisting long after the events that generated them. Victimization narratives, in particular, act as a potent ideological mechanism, reviving past grievances and fostering a perception of perpetual threat. Even politically dominant ethnic groups can adopt such narratives, portraying themselves as vulnerable population to justify exclusionary and aggressive actions vis-à-vis out-groups. This paper explores the consequences of victimized ideological justifications by Majority Nationalist Movements regarding their treatment of national minorities, arguing that victimization narratives increase the risk of violent outcomes. While existing research acknowledges the importance of nationalist narratives and historical claims in shaping ethnic conflict, these factors are rarely examined in a systematic, cross-national context. Particularly underexplored is the role of majority nationalism and its ideological underpinnings, as opposed to the predominant focus on minority grievances. Utilizing a novel dataset tracking ideological justifications and demands of Majority Nationalist Movements from 1945 to 2023, this paper addresses these gaps by systematically examining the victimization dimension of nationalist ideologies. Employing staggered difference-in-difference design, the analysis demonstrates that victimization narratives are significantly associated with an increased likelihood of one-sided ethnic violence, targeted mass killings, expulsions, and discrimination against ethnic out-groups by majority nationalists. These findings not only further our understanding of the dynamics of ethnic conflict and ethnic power relations, but also have significant implications for institutional designs in ethnically divided societies, and for designing conflict resolutions that are not color-blind to ideologies.