I think the author legitimately forgot what Justice Man was like and thinks he is a good person being mislead, lol, not like his first chapter literally told us he's killing people because the internet told him to...sad.
@Turahk I think it's sympathizing with him simply because he's delusional but wants to do the right thing. I mean someone who kills people yet still hesitates on some other people is a decent person. He just was a fucking delusional idiot. Not that any of this matters. I'm just here to see Mashiro kill a bunch of people.