I hold no secret knowledge. Not even the illusion of such. What I know is that we know little enough of these creatures, cultured or not they may be. Dwellers, again, are my more concern. Maybe peace is possible, but I've seen no sign of it. Indeed, I've seen no sign of unaggressive Dwellers. And I hold their hosting of undead in seeming fortresses very suspect.
Relax my willingness to fight them? Maybe. But I have my doubts.
We've no method of knowing a desire for peace is shared. And so I fear for the individuals who might enter a Dweller force armed only with such desire. Do we even share a tongue? Several hundred years ago, ours making peace desires came away empty hands. No historical account contact was made in the first.
We've some deeply troubling powers arising. It's all well and good to want peace with these warsome critters, but you propose no way to go about it, and none is evident. Tell initiates they have options? Certainly, but I doubt the Dwellers are keeping count. And if the Dwellers have no interest in peace, then we're lying to newcoming initiates, so strong is our desire to proclaim our ancestors bloodthirsty barbarians.