Naruto knew what world is like at a young age. His peers like playing the hero. Naruto was always the villian and gets beaten base on how weak he was after having the explosion accident that caused him to grow with a metal shard on his head. He was always the bad guy base on how he looks and suppose to be defeated, because that's what bad guys are meant to be towards heroes and a hero just beat or kill the villian without acknowledging them. Killing was a common thing in life and strong people live and weak people die, it always pissed off Naruto and hate towards shinobies that they could kill for profit. His goal is complete zero shinobies I don't own Naruto or opm all rights belongs to kishomoto and Yusuke Murata