Shi’a-Sunni Sectarian fault line is threatening to redesign the map of the Middle East with an adverse effect on global peace, increasing terrorist cells, and heightened tension in Nigeria through IMN uprising in the face of state repression. In response to state repression after the 2015 massacre of Shi’ites by the Nigerian Army (NA) and the incarceration of Sheik ElZakzaky, IMN employed procession and protest across northern states and, notably, the Federal Capital Territory (FCT) to demand the release of El-Zakzaky. Subsequently, further repression and violent attacks were meted on IMN members by state security forces in Abuja, FCT. Using a thematic review, the study examined the historical insight into the Shi’a-Sunni crisis and the factors influencing the conflict that has lasted for centuries. Shi’a-Sunni conflict, which emanates from religious factors inherent in the death of Ibn Ali and the slaying of Husayn in the battle of Karbala in 680 AD, has metamorphosed into a political crisis with the Saudi-led Sunni and Iranian Shi’a jostling for control and propagation of Wahabism and Khomeinism, respectively. Subsequently, the conflict permeates the IMN uprising and Nigeria's sectarian fault line. The Consociational Model of Democracy was used as the theoretical framework to enhance pace as the model advocates a power-sharing and equitable representation of segmented groups to enhance proportionality and decisionmaking in the political sphere. In conclusion, the study avails that variations in Shi’aSunni teachings, poverty, and politics have enhanced the IMN sectarian fault line in Abuja, Nigeria. It recommends the use of positive peace through structural changes and employment generation by the government to curtail youth unemployment and idle youth that are easily mobilized by desperate politicians and fundamentalists to incite violence. In addition, employing the Consociational Model of Democracy with a success story in the post-Apartheid regime in South Africa and the post-Rwanda Genocide will be germane in curtailing the Shi’a-Sunni sectarian fault line in the country