ISIS is a rebranded Al Quaeda in Iraq. We had them defeated in 2009 when somebody said we were pulling out because 500+ somebodies cut OIF’s funding beginning in 2007.
AIQ/ISIS discovered greener pastures in Syria and in 2011-ish moved most of their operations there due in part to the lower security capabilities of Syria.
The author is correct. ISIS is an Iraqi entity with foreign sponsorship from Turkey and to a lesser extent Qatar and Saudi Arabia.
The Islamic state WAS Al-Q in Iraq, but it changed its philosophy from killing the "far enemy" to attacking the local enemy (Shias, etc.)
The Islamic state was funded by Saudia and Qatar and still are funded by Saudi and Qatari people