The bottom line is that any group has the right to hold rules of what will qualify as membership in good standing and to hold those members to those rules. I actually don't think many people disagree with that fundamental principle.
Membership to this group includes indoctination by brow beating from a young age, and the use of deception.
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In this state the spiritual abuse of children is against the law - that is, to threaten them or neglect their developmental needs due to interpretations of scriptures (personally I'd like to see them charged over it, at least).
Grown converts to this group are victims of organised deception - namely the marginalisation of the groups' past. By the time one enters this group a duty of care has already been breached.
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People are concerned these days about "religious discrimination" to the point that they find it hard to say the truth openly anymore.