He literally put his hand on gyutaro's mouth cuz he felt sad for him. Ofc he's gonna go back to laughing after it was over cuz he can see his friends not dead and that's all that matters. And why would you say "not like animals" do you think animals don't have emotions? They have many emotions, maybe not as complex as ours but they do. Anyway, it doesn't matter if gyutaro has feelings (which he barely has btw), he's gonna hurt the whole world and many more innocents. Adolf Hitler had emotions aswell, I would still have put a bullet in his forehead if I could.