Could their be circumstances under which recreational slaughter of fellow human beings is morally justified? ——— I suppose. If every second of every human's existence was causing untold suffering in the universe for some reason, then.. It's hard to imagine how such a state could come about, but I suppose it's possible. Or what if humans started traveling around the galaxy and plundering worlds with peaceful living beings in them for their resources or maybe colonizing them. We'd be an evil force in the universe and stopping us, even a few of us, would be moral. Or you could argue that the situation is that bad already on our own world given our treatment of it. That we're destroying many, many species, and if you think about it almost everyone is an accomplice. Even the people recreationally killing others are accomplices, but it's still moral because the more people die, the less destruction of the environment there is.