@bushwhacker2k
Your not really thinking about this clearly......
The guy didn't want to just steal for food. He was going to steal from them under the condition that the child he has as a hostage would be harmed or killed. The guy wasn't starving, he saw them at the market and thought they would be easy to take advantage of. You can actually hear him say on page 5 that he wants to steal from him because he doesn't like to work. Give in to someone like that, and they'll do it again, and again. Possibly with friends next time.....
I also have to ask, why are trying to defend a man who was trying to rob, threaten, (and from the looks of what he said on page 4, possible rape too) and murder children? His actions could never be considered justified...
This was a kill done out desperation and fear, a rarity in isekai. Half the time it's done out of bloody REVENGE. The mc will first show they are a kind and virtuous person at the beginning of the story, then they lose a person or two because of their naive kindness and go absolutely apeshit on everyone involved, as well on people who weren't involved.....its weird as hell. A mc showing that while he/she is kind and reasonable, he/she will not back down against those who threaten him/her, or those he/she cares about seems so much more realistic.
At least, more realistic than these Jesus-like mcs turning into absolute psychopaths at the drop of a hat....