I would not respond at all. He is trying to bait you into an argument. He does not like that he is losing control. He is acting like an a$$ and does not deserve your time and energy worrying about it. You both know that he is the cause of the D. Even if he tries, he is not going to fool anyone. People will see through any story he tries to sell including if he tries to tell your kids it was your decision.
I would stop responding to ANY passive aggressive email/text. I think that it would be a 180 and may show him that his actions are not getting him anywhere.
