Up and pottering about again at last. 
Oh Whiff my heart breaks for you at the thought of writing that letter. Then to be castigated for it is so cruel. You have so much to contend with. I too have chronic illness and disability to fight with as well as the rubbish life chucks our way, it definitely makes things harder. We're looking to move to a bungalow during the next year, I am so looking forward to a fresh start and hope we can find some lovely neighbours.
Onwardandupwards I really have no idea how you can begin to talk to someone who is brainwashed to that extent. The fact that he is so vehement about it must be a reflection that deep down some part of him knows it will all fall apart if he allows himself to question it at all. My guess is that reality will eventually clash with his beliefs and it will all implode but he might be even more fragile if that happens. I do hope he eventually finds some way out of his darkness.
After dropping of ES's belongings, at a neutral spot, as requested (or at least one car load there's a few more but there were go many to take at once) we heard he was unhappy about some of the things we sent - he thought some were things we'd want to keep as momentoes of him. DH emailed about a couple of practical details and said, 'We would rather you told us what you wanted or came and sorted it out but that wasn't possible.'
ES replied 'I'm considering whether I want to have any contact with you both now. But I haven't decided yet.' - What are we supposed to do with that? - in fairness, this was to explain why he is dealing with certain practicalities in the way he is, but now I'm all at sea again.