Ugh, so he's going to do all these horrible things to two innocent children in order to keep a friend from doing a bad thing that he's already done five or six times by now? That's messed up. And I don't think he's being honest. He also seems motivated by this grandiose sense of his own importance to monster-kind as well as scientific curiosity. Mix that with self-hatred and emotional detachment and you get a really messed-up individual.