This paper examines the account of segregation in 1 Kings 12:1-24, where the Kingdom of Israel divides into two distinct entities due to political, religious, and ethnic tensions. By analysing this biblical narrative, the study highlights the destructive consequences of division based on cultural and religious differences. The paper draws parallels to the contemporary context of Nigeria, a nation marked by diverse ethnic and religious identities. It argues that the story serves as a cautionary tale for Nigeria, emphasizing the dangers of allowing cultural and religious differences to foster division and conflict. This is a qualitative study using the narrative method. Data was gotten from secondary literature and analysed using content analysis. The impacts of the culture of religion and ethnicity reveal that it affects electoral politics, governance and representation, conflict and instability, social cohesion, education and socialisation, and economic inequality. Emerged themes include: a) leadership and consultation; b) economic disparities and grievances; c) responses to grievances; d) secessionist movements; and e) role of mediation and reconciliation. Recommendations are discussed.