Originally Posted by
TresserT
I feel like Marsibury's personality has been pretty well examined in story. We've seen plenty of examples of how his love for humanity leads him to committing atrocious acts that he doesn't even bat an eye at. He looks at the forest but misses the trees. He performed cruel experiments on designer babies like Mash (which lead to Galahad and Da Vinci rejecting him). Seraphix is basically run on orphan souls. He basically raised Olga for some as of het unspecified purpose, and stopped caring about her as soon as that purpose was unachievable.
Based on his past actions, I have a strong feeling that, even if my personal theories are wrong, Marisbury's crime is sacrificing humans for the sake of humanity- if you've ever read "The Ones who Walk From Omelas", Marisbury would see this as an ideal world. And I think that's why Goetia was so vehemently against it- Goetia detests human suffering, so subjecting humans to that kind of suffering for the sake of humanity as a whole is worse than the destruction of humanity in his eyes.