Even though I've been away from the cult for more than ten years now, that email from your mom kind of grabbed me in the solar plexis! It would be impossible to answer it; there are so many outright lies there, misinformation, insults and insinuations and outright refusal to look at the truth from any angle! That's the kind of circular argument they've perfected! I'm glad you're beyond it. Even if my mom was still alive I don't know how I'd react to something like that. Of course, my mom and sisters never did try, pearls before swine or something!
I envy your healthy attitude.