Oh dear, this may be where he has tripped himself up....public show of abuse etc, is not quite what he wanted I guess. Now a few more know what sort of a person he is, and the fact that neither you nor his boys are catering to him tells me heaps.
What are the chances of you getting loose from this volatile and uncaring man? Surely as your husband he is legally liable to provide for you when disabled and needing help, if he is unable to get off his butt and help you. Could you and the boys, either move him out or find somewhere for yourselves.
Could you see a lawyer to see exactly what, as his wife of so long, you are entitled to receive in a settlement, after all his actions and non actions are pure abuse in my book.