He claimed to be able to save humanity so he would infect himself with the junk that turns humans into Smiles, then distribute his blood after he overcame the virus. Except then he the government pumped him full of Smile Virus 2.0 which was some nasty shit, hence the blood killing people. Not that himself was pretty great but at that point he wanted to be put out of his misery so I did him a favor by taking him out.