I really hope this doesn't become some naive idealistic talk no jutsu bullshit, the truth is, if you want a kind world, you absolutely have to kill or imprison truly evil people, because words will not sway their minds or change their behavior. All this using the sword's sheath and using knockout moves, I hope it's just practice. Mindless people who carry out violence on innocent people also deserve and seek their own death. You can say they have been misled all you want, but they are thinking adults with their own agency, and they are choosing to attack without doing any investigation. How shameless is it for a man to attack a little girl and attempt to cut off a boy's arm? What reason does he have? An investigation would reveal everything. Just kill them all for carrying out senseless violence and the world would have been a better place.
I think John here is not to blame, it's the world he is into. If it were different and something like us, somewhat peaceful and frustrating world. He would have been perfect individual living here, like any others do.