That's not exactly what you said. What you said was that raiding or stealing (which invariably is murder) and killing people who are possible future threats isn't unreasonable. Even if you don't kill anyone during the raiding or stealing (which will almost certainly always be a bloodbath) by raiding or stealing you are killing people by depriving them of their resources. In this world, everyone is a possible future theat, therefore your philosophy effectively licenses all murder for everyone.
"I mean raiding and stealing a better base or killing people who are a threat like the people in his building who are this close to attacking him and the people of rival camps isnt too unreasonable."
Your last post just before this one made it sound like you are promoting a purely self-defense philosophy yet this previous statement is a philosophy that is agressive, totalitarian and might equals right to the extreme.
@Prinzinc The discussion we are having is whether he is a sociopath who is doing this for fun instead of survival, im saying so far his actions are reasonable when you consider that everyone in this building he isnt actively allied with has killed or eaten others, and quite a few of them actually tried to kill him not to mention all the enemy camps.
This is the apocalypse, If the MC was to try to raid a stronger base for supplies and shelter it is reasonable just like what the other survivors are trying to do to him, defending your base from the people trying to invade is also valid as would anyone defending against the MC.
If he went out of his way just to burn down or poison a weaker group that was far away and posed no threat to him just for kicks that wouldnt be valid.