This incompetent report missed the key reason why Saudi and other took such drastic measures. It does not have much to do with so-called terrorism. Because Saudi hitting Qatar because of terrorism is like the Mafia hitting Mob for gangland gunfights. 

The real reason: Qatari royal family members visited Iran for R&R and some hunting. Was kidnapped by certain people in Iran linked to the complex maze of terror fractions. Demanded ransom to release the more than dozen people. Qatar gov finally capitulated and paid up to $1 billion. The money now available to finance all kinds of nasty stuff in Syria and where's not. With this payment of ransom to kidnappers in Iran (but not the Iran government) Saudi (who hates Iran more than Uncle Sam) blew its top and severed diplomatic ties. This is also why Egypt did same. 

But in the Middle East everybody is a crook. Why Saudi just spent $110 billion, $350 billion over a decade, but buy the most nasty weapons from US. Hit Iran? Why not?!