IMHO, you should at least contact an atty. I called a friend who is an atty and she recommended a very nice guy who didn't push a D at all, yet told me what my rights were, etc.... overall I had a very pleasant (well, as pleasant as it could be...) experience with my atty. Maybe you can find someone like that??
As far as the "alien" behavior......I believe that they really truly go through a personality change. It is alien to us because they are not acting like the person we married!
Are they thinking clearly?? Not sure. I think, like Bluekeys said, they are so fueled by guilt and the need to run that all they can focus on is the D.
Your H and mine both have dysfuntional families and I think that had a lot to do with their behaviors too. I wonder if H will EVER go back to the man I married. Part of me hopes he doesn't since chances are, he won't be with me!
Which leads me to your next discussion topic.......do we want them back?? I ask myself that all the time and I think I would want the H that I originally fell in love with, not the one I am dealing with mow. Not sure if that is even possible, but this man I see now is a shell of the man I married...pretty sad, huh??!
I like your 180s....I would try to start with the first few before compelely eliminating H from your life!!
Happiness is like a butterfly: the more you chase it, the more it will elude you, but if you turn your attention to other things, it will come and sit softly on your shoulder.... (thoreau)