And one of the key components to therapy, is wanting it. While you can draw someone in, success happens when that person embraces the challenge. Your husband does not sound like he cares to change this dynamic. You can give that a try but I would watch closely and set the boundary that it changes or you are gone. As someone also in that profession, I would gage damage this man is doing to everyone and put that above all else. good luck
Oh my goodness, I'm so sorry to hear this! This would tear me up as a mother. Your last sentence speaks volumes to me. When it is just you and the kids, everything is calm. When this man walks in the door, fighting breaks out.
Your son and other kids deserve a calm home. You married the 'enemy' as far as your little boy is concerned. Can you imagine if your parent brought into your life someone that couldn't stand you and forced you to live with that person?
I'm a huge fan of the family staying together. But my opinion is that I could not do this to my child. I would make plans on how to leave the situation. It would not be worth it to live with someone who made it clear they didn't like my child and were going to treat them as a second class family member. I would not put up with that. For a second. good luck
Discuss this situation with your son's therapist. After all, this is an issue that directly affects your son. This therapist might be instrumental in drawing your husband into therapy by phoning or talking to him. As a therapist, I did this quite frequently.