The House of Saud, directly and indirectly, and the proverbial wealthy Gulf Cooperation Council donors are the Mom and Dad of ISIS. All duly vetted/approved by the industrial-military-Orwellian-Panopticon complex.
And yet “Assad must go” had other ideas for Syria. He didn’t go. He and his army resisted and counter-attacked. So the original mission in Syria morphed across the (non-existent) desert border towards Iraq. ISIS kept expanding – via extortion, kidnapping, captured oil fields, tribal smuggling networks.