Church kinda like, “hero you’ve done great but now we don’t need you anymore. In fact, go die you corrupt soul.”
Instead of trying to save him from the curse as thanks for saving the world
Despite being undead, Im sure they already loathed the hero since he took what was meant to be Safi's since the hero thing was originally meant for her.
I do get the eyeroll for the use of "the church is evil/has way deeper motives than what's being shown" trope, but since the seeds for it have been planted quite a bit - especially in the last few chapters, I'm cool with it