Forgive me, I'm not saying such insults aren't hurtful, but if that's the worst they have to throw at you, then believe it or not, you're getting off relatively lightly.
How about undermining your memories of your not-long-dead parents, based on things you've told them about your childhood? Doing their level best (and they are VERY persuasive, and persistent) to convince you that you were never loved by your mother, extrapolating from stories you have told them, to construct an alternative history that paints your parents (and particularly your mother) as an uncaring, sexually profligate monster.
I have many other examples - but it's Friday evening, and I don't want to put either of us in a low mood. :-) So I'll just wish that no-one who reads this ever runs into someone like that, and wish you the very best of luck!
Cheers