User blog comment:Jopjopjop/Volume 19 Spoilers/@comment-77.255.255.37-20150110105103/@comment-16281343-20150110111201


 * Poor management from the Heaven's side on the transition from war to peace.
 * Resentment of those whose love ones where killed by the former enemies.
 * Those who have practically lived and brought up to kill them have nothing to do anymore thus losing their purpose in life.

All of these accumulated making them rebel. Though Cristaldi and Strada rebelled for the sake of the exorcists.