The roots of Saudi Arabia’s anger against Qatar runs deep in history and is entangled in territorial ambitions, atavistic fears, tribal animosities, politics of oil and so on. The faultlines run along Qatar’s refusal to toe Saudi policies—Qatar’s patronage of Muslim Brotherhood (which Saudi and Emirati regimes regard as an existential threat), dalliance with Shia Iran, support of Arab Spring, sponsorship of Al Jazeera, and support of rival extremist groups in Libya and Syria that are fighting Emirati and/or Saudi proxies.