This manga is a difficult emotional read if you consider a lot of things , like these teenage children who were supposed to be normal school going ones but have been turned into heartless murdered . I don't know if I can come to hate leonard too, knowing a lot of the wives of military personel cheat on their husband frequently but still i think this isn't his full motive like this might explain if he hated humans but it's different so I still look forward to what his real plan is