But the scripture you keep using to support this has nothing to do with denouncing a true pope being "gravely in error" in his preaching or in his doctrine. There is no Scriptural support for denouncing such a pope.
Do you understand this very critical distinction?
Again, pius, do you? We are permitted to admonish a Pope in error. There is no stated distinction within the verse. Is this what you meant when you offered to prove your point? Because to be completely honest, pius, I don't see any new argument here.