The commentary argues the Saudi-Qatari tensions lie in conflicting perspectives about the role of political Islam within the fabric of both states and their actions regionally. Fundamentally, the rivalry stems from contrasting relations between political and religious elites in each country which has taken on increasing political importance in tensions between Riyadh and Doha. Central to much of this are questions about the role played by the Muslim Brotherhood (and its various affiliates). More relatedly, the Saudi-Qatari rifts emerge out of competing understandings of authority and legitimacy, and with it, concern at the contestation of these claims.