Here's another option......

You walk in, befriend the village. You neither kill them, nor subject
them to your tyranny. You come to their aid at their request. You
drink their ale, share your own, dance around their fire, discuss
how many fish they caught that day, bounce their children upon your knee.

Who the hell is anyone to tell anyone who they can or cannot protect?
If the undead do not want the Infernals protection, I think Zsarachnor
is big enough to tell us all this. If the Shaastan villagers do not
want Shallam protecting them, I believe we would hear from them as well.

Galdrion Longshanks

Penned by my hand on the 10th of Sarapin, in the year 244 AF.