Greetings, Jules, and welcome to the forum:
We are enjoying your story and, of course, sympathize with you. As I parent who saw my first child "leave" the Truth several decades ago, I understand your parent's pain. However, I am on the other side now and my adult child and I get on fine. Sadly, I feel guilt because the other child wanted my spiritual help and guidance from early on and I failed to give it.
We are estranged and it kills me. Yes, on either side of the fence there is pain and sorrow. I hope you will be encouraged to soldier on by what you read here; you have gotten a lot of fine counsel.
Blessings and peace,
CoCo