I have stood up for him but he is not there to see it.
Ok...good for you!
Now the question is, how do you communicate this to him so that he 'see's it?
Would it be best to talk to him and say, "H, I understand the way you are feeling. I had a talk with XYZ and told them they are to treat you with respect. They understand where you and I stand now. I hope you know I love you and that we will get through this together."
Or would it be better to email him and say something similar?