There is, essentially, a civil/sectarian war going on within Islam that features radicalized fundamentalist Sunnis i.e., ISIL/Daesh, al Shabab and the Taliban against moderate Sunnis and the Shia sect of Islam who live mostly in Iran, Iraq and Syria, where the Alawite sect, which includes the Assad regime, is a Shia sect. Most of the trouble comes from Wahhabism — a deeply intolerant and fanatically misogynist branch of Sunnism that originated with the desert tribes from Saudi Arabia. Oil wealth has allowed Saudis to fund madrasas all over the world and spread Wahhabi hatred far and wide and give Islam a bad name. The 911 terrorists were Saudis and, indeed, money from the Gulf continues to fund terrorism. The US knows that but, alas, Saudi investments in the US are enormous.