[The “state religion,” if there is such a thing. They honor the life of the body and abhor the corrupted spirit world. Essentially a secret society.]
The secret society was, years ago, nearly wiped out by an unknown event, known as The Rapture.
Everybody who went to it died horribly, Inspectors said they seemed to all kill, maim and canibalise themselves and each other in the middle of an orgy. The only trace they found were some weird machines - technically savvy people involved in the investigation suggested they were used to distribute something airborn within the churches. However, there was no trace of the chemical. There was nobody to interview because everybody involved was dead. In the end, no culprits were found and the general consensus was that the 'heretical branch' of the church wiped themselves out (especially due to the rumors of Rapture).
The remaining members, who happened to not be present at the event, renounced the dead as heretics and made a statement that what they did was 'the vilest rejection of the sancity of the body and life given to us'. After that, the small group made efforts to bring more people into the fold, being much more adamant about their beliefs and trying to reassure the public that no such thing will ever happen again.
Currently, the church is on its way to having, once again, a decent following.