Sobernow - eeek! I would have died of embarrassment! I have yet to be in a position where my mother says any of this kind of thing in public.
Thanks, everyone, for messages of sanity. There are only so many times you can have this conversation without thinking, "is it me? Am I actually being a horrible son, and being unreasonable?" She said "Do you even like me any more?" last night.
She has had a terrible year with my dad in hospital, then nursing home, and will always turn on the "poor me I'm so lonely and frightened about the world" when she feels she is losing the argument.
I tried to hang up without actually "hanging up", if you see what I mean, but it was difficult. She is an expert at the "but anyway" school of argument, possibly the most irritating rhetorical gambit known to (wo)man: "The country is full of these people, we can't take any more, they are draining the resources of decent people who have paid all their lives. But anyway, I saw Maureen the other day and she gave me the recipe for that marmalade." Etc. So, unless you want to let her get away with it, you are forced to go back if you actually want to counter her point, otherwise you are stuck talking about someone called Maureen and her fucking marmalade for half an hour.
The other thing she does is to be unable to believe that anyone (especially anyone younger) has alternative evidence or facts that may cast a different light on things. She thinks that, if you don't agree, it's because you haven't understood her argument, and can't grasp the concept of understanding it, putting it in context and moving on. So she will say something and then say it again, more loudly. (AGAIN, MORE LOUDLY.) And of course, she is "not making it up." (NOT MAKING IT UP.)