the mc is literally a baby, so naive even tho its a full blown war, kill your enemy whenever you have a chance is something you always have to do, yet he thinks hes in a fairy tale where no bloodshed is possible
Yes. However, not only is he naïve, he's been heretofore stupid about one critical fact: he's been thinking that he's reincarnated into the game he played in his original world--he has avoided accepting the fact that he has, instead, entered a
reality based on that game.
Quite stupid, because even he had his hangups about killing. Why? It's just a game after all, isn't it? And he's "just a mob" in that game, right? Thus his stupidity spread to other aspects of his very real life in that world--including and especially his interactions with Angelica and Olivia (i.e., "I'm just a mob, they wouldn't want me," or any number of excuses he could come up with to avoid facing their poorly concealed feelings for him). As a result, and as multiple people have already said, his pointless and self-contradictory creed of nonlethality has lead precisely to the events of this chapter's end.
Not killing an enemy who hates you enough to commit to killing you isn't mercy, it's begging for your own downfall--if not specifically your own death.
That aside, I'm happy to see him shed his nonlethality in this war--at least that, if not his ridiculous belief that he's somehow coded into a world of ones and zeroes instead of
living in a very real world where people live and die. There are enough people around him proving that there are no save points by which they can be brought back. Even more than that, however, is my happiness to see those who exploit nonlethality being answered with what they're begging for in so doing: I've read way too many stories in which a "hero" commits to avoiding killing--while consequently creating as many problems of the sort Leon did with that one pilot in this chapter--despite that very commitment being exploited blatantly and flagrantly in his face. Utterly senseless, but such senselessness is the mangaka's habitual stock-in-trade where things the mangaka feels he
must preserve are concerned.
The principality princesses won't be executed for everything they have done will they?
lol Of course they won't, their flat chests are a different kind of plot armor. Marie's still kicking, isn't she? So is Hertrude, and her transgressions against the Kingdom are ongoing--she survived long enough
to be rescued.