The modern-day Shiite-Sunni split between the Sunnite Kingdom of SaudiArabia and Shia theocracy Islamic Republic of Iran is predominantly portrayed as a sectarian conflict. Instead, their rivalry constituted geopolitical, economic, military, and religious supremacy and legitimacy in the region of the Middle East. Riyadh and Tehran are convoluted in a complex rivalry over a volatile region where both want their dominance and become a Muslim world leader. Religious dissimilarities are of secondary worth for the political elite of both the states, despite the doctrinal variance of Wahhabism and Shiism in their socio-religious setup; the competition of geostrategic influence in the Middle East makes the primary concern instead. Both countries have directly and indirectly supported sectarian violence and militancy in the region, which has caused immense harm to Muslim unity. Muslims are embroiled in several problems and conflicts throughout the world in the name of religious sectarianism, which has weakened their position at the international level.