Friends off the deep end

Hopefully at some point he can get some help. Sounds like he's well beyond PPD and delusional to the point of psychosis.
I'm not trying to sound like I know something. I just hope he gets help.
Perhaps his family will find a way to get him treated and medicated.

My mother had alzheimer's dementia. Totally different thing.
She was rarely lucid at the end. She accused me of being a Russian spy impersonating her son one time. thought I was holding her prisoner on a giant ship.