Yes, wee need a more options in this quest. One of them is to enlist in the service of demons, knowing that they are demons, and to receive a demonic reward from them and the prospect of further quests. When I tried to talk about knowing their secret, they just attacked, this is not right.
At this stage, the only logical conclusion of the quest is to help the tiefling girl, there is no motivation to help the "paladins"
they're not demons. they made a pact with a devil. the lead guy is a fallen paladin, a former champion of tyr. the reward is his old sword. He was ordered by his patron (Zariel) to return her soldier who went AWOL in lieu of Zariel taking his own soul. He said that when Tyr did not answer his prayers, Zariel did, to give him the power to save his people when his own god did not. In a way he's not that different from Wyll, who was ordered by his patron (Mizora) to help her escape in lieu of his own soul. He just seems like an ultimately nice dude who's stuck between a rock and a hard place.
