If the other party only wanted to eliminate the Holy Spirits Church, William would have simply raised his hands in agreement. He might have even helped fill the pits for the rotten organization and placed some flowers after the burial.
However, it was clear that the other party was considering tearing everything down.
This could be seen in their desire to resist the so-called tyranny of Currere. What they wanted to destroy wasn't the faith of the Holy Spirits, but the concepts they represented.
Perhaps what the other party wanted to do was even crazier than the Void Sovereigns.
Uh… At the very least, crazier than most Void Sovereigns.