“If a future pope teaches anything contrary to the Catholic Faith, do not follow him.” – Pope Pius IX
Popes, Saints, Fathers, Doctors and approved theologians of the Roman Catholic Church have told us through the ages that a pope can be a heretic against the Roman Catholic faith and attempt to destroy the Church through inappropriate policies.
Such a pope is to be disobeyed and resisted as a matter of duty.
Venerable Fulton Sheen
Pope Benedict XVI
Saint Thomas Aquinas
Pope Innocent III
Pope Pius IX
Saint Robert Bellarmine
For full quotes and commentary please see
The Right and Duty to Resist A Pope