Why are some everyday people disposed to violent actions against their outgroup friends and neighbours during interethnic conflict, while others are not? Variable conflict behaviours in intrastate conflicts have received significant attention. However, these undertakings have generally focused on the variations between the behaviours towards proximate and distant ethnic others and the role of external pressure. In contrast, the variable conflict behaviours of everyday people living in proximity, without formal militia affiliations, have been under-researched. Yet, qualitative inferences on the individual-level dynamics accounting for the variable dispositions among neighbours are significant as they broaden our understanding of when friends may or may not attack their outgroup neighbours during interethnic strife. Therefore, this paper examines this issue drawing on extensive qualitative data on everyday people's conflict-time experiences of intergroup relations in Nigeria's ethnic conflict hotbed, Jos. The analysis indicates that not only did past friendships motivate information sharing between ingroup and outgroup members who sought to protect their friends, it also facilitated the conflict as other ingroup members exploited past friendships to advance their killing objectives or to furnish their ethnic armies with intel on their outgroup friends. It concludes that the central mechanism explaining cooperative or aggressive dispositions is the degree of threat perception among everyday people..