@FearlessDiva,
Yep, those folks are stupid, and you may be onto something in terms of them potentially being abusive as well.
I think one thing you can do with the folks who are on the receiving end is to give them support and hope.
If Betty keeps hearing from Don that she's a bad person, she's stupid, and she can't do anything right, that's probably going to become her self-talk after a while.
So tell her the things she does right. You're not a bad person, Betty. You're kind and generous and unselfish (use examples here). You're smart - remember how in school you always got the Spanish homework right (again, lead with specific, germane examples if you can)? And you do plenty right. Look how good you are with little Charlie. You're doing a lot right and should be proud.
See where I'm going with this?
Betty (and anyone like her) needs a gentle counter to the self-talk (and abusive talk) she keeps hearing. She needs counter examples that mean something to her.
Even something small.
* You make the world's best tacos, did you know that?
* You've always got such a great manicure. Can you show me how you do that? 'Cause to me, it's just a mystery.
* Taking in that stray kitten was so sweet and loving.
Hope this helps.
PS You're good to want to help people -- but recognize that abusers will have no problem lashing out at you if they think you're messing with what they see as a good thing. So please be cautious.