He's not really, except for the fact that he is the creator. it's the same as a person creating a weapon of mass destruction, even though the weapon is the one doing all the damage, they still made it happen. i never really read the book i just skimmed it but i hope i helped anyway. good luck! =)
since he's the one who ordered to dig up corpses to be made into a single entity.i'm not quite sure but i seem to recall that he preferred human parts that came from criminals(heart of a murderer,hand of an arsonist,etc).and of course,the old standby: he tried to create life which only God is supposedly capable.