Pretty hilarious that a few hours after being all depressed about actively killing enemies in a war, he's now having lots of fun and kills shitloads of sentient beings that don't deserve to live any less than humans and is treating it like a way to get out of work for a while.
Dude, even being a hypocrite has its limits, right? According to his own logic, his actions are the very opposite of what a hero's should be. Why not just knock them out?
Mind you, I'm all for killing bothersome trash like this that exists to cause trouble. I just don't like them being all moral and upright about not killing the previous chapter and then going off on a god damn rampage right away while joking about it.
I guess he considers all life but human life worth jack shit. Oh, wait, I guess all life but typical humanoid life where the creature looks overall human, because devils, mermaids and whatever other humanoid race is fine. But not if they look less human despite clearly being humanoid/standing on two legs with two arms and as sentient as a normal human. Them lacking "human emotions" is not an excuse either since they clearly do have emotions and that spacetime girl and some others clearly lacked far more than them.
Just makes me tired is all.