Anathema=accursed.
That is a bad thing, leading to Hell.
Read your old teaching, not the fluff since Vatican II.
The old meaning is Greek, and to say that someone should be anathema due to their teaching, is to say that they should be rejected as a teacher. Yes, rejected strenuously.
If a stretched inference of “anathema” is what you are hanging your hat on, I think I’m done here.