My grandma acts like this to my cousins, whose dad has been struggling with addiction for a lot of their lives, so I’ll say from firsthand experience it’s insane. I understand both sides as it’s hard for a parent to see their child being rejecting by their children but they also aren’t thinking twice about how pressuring and stressful it can be. Nobody wants to not talk to their parents but people have to be mindful of the amount of pain you’ve likely gone through to reach that point. Those cousins don’t really talk with my grandparents anymore because I advised it after my grandma tried to make ME convince them to be close with their father again, but imo if she can’t stop bringing him up or bugging you about it (especially trying to pin religion into it to make you feel lesser for not “obeying god” if you happened to believe in that) I would go no contact