My heart breaks for you.
No matter how this turns out, you will never be the same due to the awful things you are seeing. Your narrative highlights your hurt and confusion and no one can blame you for that! I wish I had some words of wisdom for you, or a course of action that would guarantee a good outcome. Time will tell.
You are right. It is more than a religion and so, sadly, I have to say that I agree with those who counsel that you should run for your life. You do not have to meet with any of them. There is no win for you to meet with them. I feel so bad for you and honestly, I feel bad for your ex. His buttons are being pushed and it looks like he's not ready to run yet. Such unnecessary sadness.