M.W.
P., I think that having your children speak with a child psychologist may help figure out why they are having the feelings that they do about their father. When a child develops a sudden hatred for a parent, it could be they are picking up an attitude from the other parent, or it could be far more sinister. But it is seldom for no reason. Please don't let this continue without the help of a professional, because it could damage their future relationship with their father, or it could be something that is hurting them right now. Don't delay, please seek help for your children. I was in an emotionallly abusive marriage for many years, if I had picked up on the prompts of my son I would have realized sooner how damaging it was to me, and how it damaged him. I never dreamed that my ex had been emotionally abusive to my son, he only did it when I was not there, but my son avoided his father. I have caused my son a lot of problems dealing with his mistrust of authority figures, with anger control, and with the hatred that he feels towards his father to this day.