ISIS/ISIL is a Western elites operation.
It’s yet another attempt to political support for the US military to be able to overtly participate in various new world order tasks in the area, one of which is to assimilate Syria into Western finance/trade/banking.
If you want a war, you need an enemy.
CIA creates wars for Western elites. As the espionage department, it’s the natural government agency for the task. Thus there are “shady” dealings all the time with criminal and terrorist organizations, all under the guise of “national security”, “sometimes we have to deal with unsavory people”.
Saddam Hussein started his career working for the CIA.