the other by Robert Pape of the University of Chicago), most of the suicide bombers in Iraq are Saudis. Fifteen of the 19 hijackers of the four airliners who were responsible for 9/11 originated from Saudi Arabia, two from the United Arab Emirates, one from Egypt, and one from Lebanon. Osama bin Laden was born and educated in Saudi Arabia. Starting in the mid-1970s the Islamic resurgence was funded by an abundance of money from Saudi Arabian oil exports. The tens of billions of dollars in "petro-Islam" largess obtained from the recently heightened price of oil funded an estimated "90% of the expenses of the entire faith." Throughout the Sunni Muslim world, religious institutions for people both young and old, from children's maddrassas to high-level scholarships received Saudi funding, "books, scholarships, fellowships, and mosques" (for example, "more than 1500 mosques were built and paid for with money obtained from public Saudi funds over the last 50 years"), along with training in the Kingdom for the preachers and teachers who went on to teach and work at these universities, schools, mosques, etc. The funding was also used to reward journalists and academics who followed the Saudis' strict interpretation of Islam; and satellite campuses were built around Egypt for Al Azhar, the world's oldest and most influential Islamic university. The interpretation of Islam promoted by this funding was the strict, conservative Saudi-based Wahhabism or Salafism. In its harshest form it preached that Muslims should not only "always oppose" infidels "in every way", but "hate them for their religion ... for Allah's sake", that democracy "is responsible for all the horrible wars of the 20th century", that Shia and other non-Wahhabi Muslims were "infidels", etc. According to former Prime Minister of Singapore Lee Kuan Yew, while this effort has by no means converted all, or even most, Muslims to the Wahhabist interpretation of Islam, it has done much to overwhelm more moderate local interpretations of Islam in Southeast Asia, and to pitch the Saudi-interpretation of Islam as the "gold standard" of religion in minds of Muslims across the globe. Patrick Cockburn accused Saudi Arabia of supporting extremist Islamist groups in the Syrian Civil War, writing: "In Syria, in early 2015, it supported the creation of the Army of Conquest, primarily made up of the al-Qaeda affiliate the al-Nusra Front and the ideologically similar Ahrar al-Sham, which won a series of victories against the