This is why I'm an anti-theist though. This kind of institutional maneuvering shouldn't apply when you are discussing something about the final arbiter of morality.

I understand why a Bishop can't formally tell the pope to ESAD, BUT I really do believe that this response is appropriate.

The pope is not infallible. At a certain point, it is obvious that someone in the church is an enemy of God and should be punished as such. The hierarchy of their position is irrelevant when they are an apostate.