ISIS didn’t start in Iraq. ISIS emerged from the shadows of the Muslim Brotherhood in Egypt, the same Muslim Brotherhood that Obama supported when they tossed Mubarek in jail.
The fighters were forced to leave Egypt after they killed Anwar Sadat and moved to other areas including Iraq (to fight in the Iran-Iraq war) and Afghanistan (to fight the Russians).
Al Qaeda, Taliban, ISIS/ISIL all have roots from Egyptian Islamists supported by Saudi money.