This dissertation focuses on neo-Nazi and violent jihadi propaganda and its role in defining social boundaries. Frame analysis was used to gain a deeper understanding of how neo-Nazis and violent jihadis construct propaganda to neutralize objections and promote drift. Specifically, diagnostic and prognostic frames were analyzed for 10 effective propagandists and two ineffective propagandists in a comparative framework. This research uses a social psychological perspective, paying particular attention to the emotion of shame and advances the violence as communication model into terrorism as criminogenic propaganda. Qualitative and quantitative methods were used to analyze how neo-Nazi and violent jihadi propagandists incorporate diagnostic and prognostic frames as techniques of neutralization. Specifically, I analyzed: (1) frame typologies, (2) relationships between frames, (3) location of frames, and (4) frame prevalence. The results provide a better understanding of the link between terrorist propaganda and radicalization and can be used to inform future research and policy decisions