How are perceptions of past collective trauma related to moral lessons derived, and how are those in turn associated with conflict-related policy preferences of those presently involved in intractable conflict? We hypothesized that inclusive conceptions of past trauma will be positively associated with moral obligations and negatively with moral entitlement, and that moral obligations will be positively associated with humanitarian policies and negatively with militaristic policies, while moral entitlement will be positively associated with militaristic policies and negatively with humanitarian policies. In a cross-sectional study with a representative sample of Jewish Israelis (N = 504), moral obligations mediated the association between higher inclusivity of past collective trauma and humanitarian policy support, while moral entitlement mediated between lower inclusivity and increased militant policy support. Inclusive perceptions of past trauma and its moral lessons may play a critical role in advancing conflict resolution in intractable conflicts settings unrelated to the initial trauma.