Not the only factor, but the Saudis have funneled a great deal of oil money into spreading Wahhabism. https://en.wikipedia.org/wiki/International_propagation_o

Not the only factor, but the Saudis have funneled a great deal of oil money into spreading Wahhabism. https://en.wikipedia.org/wiki/International_propagation_of_conservative_Sunni_Islam#.22Petro-dollars.22 https://en.wikipedia.org/wiki/International_propagation_of_c...