[@DeadBeatWalking]
>elves being equivalent to goblins in this setting
Aren't elves more like twisted gaelic Fair Folk in this setting? 

>Where does the semi-justified reason come in?
The world's still magical and full of superstition, duh. I bet there are many gods, occasional miracles and other wondrous and horrible happenings, not to speak of actual sorcery and wizardry. Guy might harness actual power of Luna through some evil rituals and bathing in virgin blood, even.

>something a human village would band together against
Well, if one isn't ready to put up with occasional human raid why bother playing elves at all?