IB Snodderly is right, and it is my experience also that they become totally different. They write and talk as if there was an invisible puppet in their b-crack. It is the only way I can describe it!
I have just finished an interchange with my xh in which I told him finally that I did not want to hear from him again, because after nearly seven years he had become irrelvant to my life.
He had become the raging monster again, and I am not dealing with this any more. I honestly think he is crazy. Not the man I married, and spent most of my adult life with. An embarrassment to me and to his children, but he does not see it that way. The good thing it no longer matters, except that it is always sad to see someone turn out this way.