User blog comment:Jopjopjop/Volume 18 Spoilers/@comment-173.71.153.83-20150210171741/@comment-24098614-20150226012609

I hope also tthat they learned their lesson during that incident in which many servants rebelled, and they had to put to death because of the Khaos Brigade attacks on the Underworld because failure to learn from your mistakes in history means that you are going to repeat them, and have the same results.

This incident was a wakeup call that the old ways don't work as well as they sought, and we are dealing with Reincarnated Devils that were Human before so this type of thinking is archaic and obsolete in my opinion, and if they are not careful it could lead to their downfall.