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But let me point out that Bush hasn't been president for almost 7 years and ISIS has only been around for about a year, so explain how ISIS is Bush's fault.
Thats easy. Bush drove secular minded Sunni officers in Iraqi's Baathist Army into having no role in the Shiite majority run new government and army. They of course sided with AQI and led an insurgency against the new Shiite dominated government until Anbar warlords were fed up with AQI and they drove them to seek refuge elsewhere.
Abu Bakr Al Baghdad recruited many of them into his cult but their goal was likely to retake control of Iraq not go along with Baghdadi's cult-like apocalypse now ideology.
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There are reportedly approximately 1000 medium and top level field commanders, who all have technical, military and security experience. Salaries range from $300 to $2000 per month depending on the job post according to Ruth Sherlock, a reporter for
The Telegraph.

Source:
The Telegraph
The graphic above from the British newspaper
The Telegraph breaks down ISIS's corporate hierarchy. Here's some details we gathered about several members of that team.
Abu Ali al-Anbari
Fadel Ahmed Abdullah al-Hiyali
- Nome de guerre Abu Muslim Al Turkmani according to the Wall Street Journal.
- Former general in the Iraqi military’s intelligence, according to The Telegraph and spent time as a special forces officer.
- Decommissioned from the Iraqi army after U.S. forces arrived, he joined Sunni Muslim insurgents to fight the Americans, according to the Wall Street Journal.
Abu Salah
- Real name Muafaq Mustafa Mohammed al-Karmoush, according to The Telegraph.
- Responsible for managing the finances of various Iraqi provinces, according to The Telegraph.
- Formal general under Saddam Hussein according to the Wall Street Journal.
Adnan al-Sweidawi
- A former lieutenant colonel under Saddam Hussein who now heads the group’s military council according to the New York Times.
Adnan Ismail Najm
- Known as Abu Abdul-Rahman al-Bilawi al-Anbari, was killed in June fighting in Iraq, according to the Christian Science Monitor.
- Worked closely with the former leader of al-Qaida in Iraq, Jordanian-born Abu Musab al-Zarqawi, according to AP.
ISIS isn t a band of unorganized militants it s a 21st century corporate juggernaut - DecodeDC Story
Bush created a ready made military hierarchy for Baghdadi to exploit for his insane cultist ideas.
These former officers should have known their dream could not be realized because they have no chance of ever acquiring an Air Force or a navy. When they are all killed or driven back into hiding, DAIISH will start its complete demise.