day, many political regimes in the Middle East have been sectarianizing their internal and external policies, (i.e., given doctrinal features to these policies). This is what led to the emergence of new alignments and alliances that changed the political map of the region. With the help of the securitization theory, which was developed by the Copenhagen School of Security Studies, this research attempts to explain the phenomenon of sectarianism and its repercussions on the security and stability of the Middle East. The research also deals with the emergence of a security complex or dilemma on sectarian bases, such as the Iranian-Turkish-Saudi complex, and its role in creating hotbeds of tension and conflicts in the region.The research studies the phenomenon of securitization at the local and regional levels, and assumes that this phenomenon, despite its historical roots, is made by the regimes themselves, and is only intended to pass political projects that serve the regimes but not their peoples. The research concludes that there is no solution to sectarian dilemmas except with mutual understanding among the regimes that make them, and the resort to the policy of friendship and cooperation instead of the policy of conflict and rivalry.