His solution to the goblin problem is to throw the women out to them. He definitely has no regard for human life.
His extremism comes from a twisted mentality.
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I took this as him killing his mother as well, considering his willingness to kill Lona upon being angered.
High functioning psychopath describes him well. He may ultimately end up saving people through his research but it most definitely would not be out of the kindness of his heart. Furthering his own goals or making a profit is more likely. He's a necessary evil at best imo.