Nigeria is constitutionally a secular state but underneath, religion plays a fundamental role in the socio-political governance of the people. The integration of religion and politics in Nigerian political history by her founding fathers is believed to be one major problem behind the current religious violence and political instability bedevilling the country today. The aim of this paper is to understand why the political history of Nigeria is shrouded in religious bigotry by providing the historical overview of the background that (...) has influenced the socio-religious and political activism in Nigeria. The paper also examined the passivism or activism of the two major religions: Christianity and Islam in seeking socio-political justice and control in the political activities of Nigeria and the aftermath of this power play in the affairs of governance. Lastly, the paper critiqued the effect of religious involvement in either promoting or reducing socio-religious and political crisis in contemporary Nigerian society. The paper adopted the historical and descriptive research methods and argues that the present religious violence and political instability, is predicated by the “divide and rule” and the pretentious “amalgamation” policy of the Colonial Administrators that favoured the North against the South. The seed planted by the Colonial Administrators before Independence is what has gradually grown into a monster that is threatening the peaceful co-existence of the Nigerian State. The paper concludes that to restore peaceful co-existence in a heterogeneous State like Nigeria, there is need for a realistic constitutional amendment that will truly reflect the heterogeneous secular nature of Nigeria and consider the wishes of the Federating units and by addressing the political, religious and other social-economic issues that are threatening the peaceful co-existence of Nigeria society and guarantee every religious group equality before the law. (shrink)