"(NB – Osama bin Laden is actually a Deobandi rather than a Salafi, though the two systems share a rejection of the seductive materialism of the West. His closest links are to the Asiris, who were also poorly integrated into Saudi Arabia and marginalised during the years of the oil boom. Nine of the 15 9/11 hijackers were from the Asiri al-Ghamdi tribe)."

That paragraph alone is worth the price of admission; in addition to all the other gems. Hen hao, yinshisiyuan, xiexie and welcome aboard!