I'm impressed, FS. That's very assertive, calm and boundaried behaviour.

It is also KIND behaviour. Your H is going to have trouble with this. It's a human response to find this painful, and when humans are in pain they sometimes act badly. By not letting him act badly towards you, and giving him privacy and space to process his own emotions, you are putting air and breath into a hard situation that means he's not going to have the chance to behave in ways that he will regret. He can rant and rave to his friends or partner. It isn't your role. You are being KIND not to take that role as it will help both of you move on to, eventually, a more comfortable and cordial co-parenting arrangement.