I think he might not know about the demon manipulating the monsters in the forests and when he is older he doesn't dig in too deep on the attack. About the monsters are acting weird and everyone knows, I think it because Eric's action that makes the villager aware of it.
@joel7686
ohh, thx for the explanation. I did know ishizu was isekai'd atleast but summoning 100 fuckin people a year? bruh. But again, thx for the explanation.
@fernaldi01 oh yeah lol
@joel7686 my memory is totally blank about the japanese in this manga, i've read too many manga :(, care to explain if you can?