IMHO you are being too polite to him. He needs to have something to shake him out of his status quo.
Maybe tell him that your SD's have said they were uncomfortable with what had happened and that he can extend an olive branch to them but you are not going to get involved.
If you tell him that you will talk to them, etc. and they reject the idea of seeing them, he could turn it around and accuse you of making things up. I've seen it many times here and suddenly you become the bad guy.
It's important to note especially when you say he's bipolar. Practically anything could set him off.
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.
