The title of this thread asks; How can a true pope be an "enemy of the faith"?
Please post any teaching from any magisterial docuмent or any saint or father that teaches it is an impossibility that God would ever allow a pope to be an enemy of the Catholic faith.
All I ask is that you do not post any teaching from any of the 20th century theologians.
Not sure what your views are or what you are getting at but I think a true pope can not be an enemy of the Faith because to be that, he would have to teach heresy officially which would automatically exclude him from the faith and he would no longer be Pope. In his private capacity or his sins of the flesh, those do not attack the Faith.
My view is that there is no way to prove the conciliar popes are not popes and proof is needed, that short of Divine Providence, there is nothing to stop a pope from doing what the conciliar popes have done. Nothing.
Most sedevacantists proclaim that "the pope is not the pope", as though it were an indisputable fact rising from divine revelation - when the real fact is the pope was elected in the same manner as the previous +200 popes, so the presumption must side with the same validity as all the previous elections. Which means that the pope is the pope until another pope at some time in the future makes the declaration that the conciliar popes have not been popes. No one else has the authority to do anything about it - this is demonstrated by the last 58 years where not one single thing has been done about these heretical popes by anybody.