B, please dont write him. He is hearing, "blah, blah, blah, there goes B again."
I'm sorry, but, he doesnt hear you. You will just be spinning your wheels. I know you hope that something you say is going to get to him, but, it isnt.
You answered him. He doesnt deserve an answer from you. And the fact that he cant figure out why you are upset just shows you how far into the tunnel he is.
You do what you need to do for you and your kids. To heck with him.