My point is valid regardless of whether we agree or not. To continue the analogy. Supposed we all owed Dodge Caravans, but 1/3 of us insisted that their Caravan was made by Ford and 1/3 insisted theirs was made by Chevy, and 1/3 knew ours was made by Chrysler/Dodge.
The Ford and Chevy adherrents may construct a service manual for a Caravan purporting to be from Ford and Chery. And it may even have reasonable service guidelines that often may mirror the service guidlines from Dodge.
If they ever go to Ford or Chevy and insist they honor a warranty on a Caravan, they will be in for a rude awakening. There is only one manufacturer that honors warranties on Caravans, that's Dodge.
In the same way, adherents of false religions are going to someday find out that they've been following the wrong instructions and the warranty they thought they had through these false religions is of no value.