External actors play a key role in conflict management and resolution, as they can contribute to resolving the cause of the conflict and partially changing or meeting the goals of the conflicting parties. Among the most persistent conflicts are religious and other identity conflicts, since identity influences the belief of an individual and a group about their role in the conflict. Due to their knowledge of the region and actors, the advantage in detecting and resolving such conflicts lies particularly with regional organizations, including the Gulf Cooperation Council (GCC) member states, which are actively engaged in the management and resolution of the Israeli-Palestinian conflict. The master's thesis examines the influence of the religious factor on the role of the Arab Gulf states in resolving the Israeli-Palestinian conflict since the founding of Israel in 1948 up until the Qatar diplomatic crisis in 2017, and the consequences of the intensification of the Shiite-Sunni divide on their role. In the period between 1948 and 201 the Arab Gulf states persistently sought to resolve the conflict in favor of the Palestinian population; however, with the intensification of the Shiite-Sunni divide during the Arab Spring, the Iranian threat overshadowed the resolution of the Israeli-Palestinian conflict. External actors, especially regional organizations, are therefore sensitive to international and regional developments, as well as possible changes in the dynamics of the conflict. The latter consequently influences the role of external actors in managing and resolving conflicts, which can change from positive to negative, in the light of changes to the structural environment.