and the exploitation of religious civil war to carry out strategic objectives are at the core of the policies he carried out with ruthless efficiency and even the outward appearance of personal integrity. That's what made him so valuable as a political General to both Administrations, and why he was continually promoted in position and in the public eye until he stepped over a line.
As Director of CIA, he was a principal architect of the regime change operations against Libya, Syria and Iran, and had even figured out how to leverage one to carry out the next, as the CIA used Sunni terrorists and looted heavy weapons exported from one country to attack the next regime. Even if not a single CIA officer ever touched a MANPAD or a car bomb, the regional civil wars they set up assured that process of terrorism, overthrow, and the regional weakening of Shi'ia Muslims would proceed. That model was first proven in Iraq with the arming of Sunni terrorist groups and implementation of the Salvador Plan. Petraeus understood all too well that the road to Tehran proceeds through Baghdad, Benghazi and Damascus.