I think that a "simple" assumption that it is a priest is not deep enough. In the song he says "hippocratic" not "hypocritic," which would more likely refer to a doctor of some kind. I think it could refer to any religious authority figure, including a priest, or just a pillar of the religious community. And the apocalypse is way too deep for me, though possibly fitting with the band's name. "When your world comes crashing down" is a pretty popular phrase for when a person's life falls apart or they lose control and/or respect in the community. In this case, just the secret coming out would suffice.