When my axw would be quacking at me, I would calmly look her in the eye and say, "Yes". Then walk away.
Didn't matter if she accused me of being the neighborhood axe murderer, "Yes"....then walk away.
Your AH: "You know, I hate it when you go to those damed Alanon meetings, every time you go you just get WORSE. Those idiots are brain washing you. I think it's a damed cult".
You: "Yes". Then walk away/out of the room/out of the house.
Of course I only managed to do this SOME of the time. But it avoids a fight, well they still get rabid, but at least I didn't get sucked in. It was fun, like a game to NOT go there with her.
Again, I was only successful SOME of the time.
Good luck, it'll get better.
Thanks and God bless us all,
Coyote