The spell is supposed to only target a "willing creature", which I guess, Larian decided to consider them not to be willing creatures?
But I do understand this sentiment, a lot. I also wanted to try that but couldn't 😭
Does Calm Emotions works? I don't remember from my own playthrough 😅. I feel like this one should for sure.
Not sure about calm emotions. I only attempted to use PfGaE and was unable. Most likely calm emotions might stop them from fighting, but it wouldn't break the mask curse or make it so you can interact with them. Something else to try I guess.