Board Thread:Rebirth: Applications/@comment-25152698-20141123203413/@comment-25152698-20141125020155

It wasn't taken over. The entire destruction bit was changed to Otogakure. As far as we know, from the information that remains from Kai's Iwagakure article, it was indeed attacked... we just don't know how much.

Now to answer your question, practice of the religion was prohibited. As in, not allowed in Iwagakure. Black Crown coming was almost like the Shinju sending it's messengers to rescue it's followers.