Wow. Here is the statement from Bishop Bernard Fellay, superior general of the Society of St. Pius X, responding to the lifting of the ban of excommunication.
It reads, in part,
"I reminded him [Cardinal Castrillon Hoyos] that we were suffering much from the present situation of the Church in which this teaching and this primacy were being held to scorn. And I added: “We are ready to write the Creed with our own blood, to sign the anti-modernist oath, the profession of faith of Pius IV, we accept and make our own all the councils up to the Second Vatican Council about which we express some reservations.” In all this, we are convinced that we remain faithful to the line of conduct indicated by our founder, Archbishop Marcel Lefebvre, whose reputation we hope to soon see restored."
...Before us, Paul VI went so far as to say that “from some fissure the smoke of Satan had entered the Church”, and he spoke of the “self-destruction of the Church”. John Paul II did not hesitate to say that Catholicism in Europe was, as it were, in a state of “silent apostasy.” Shortly before his election to the Throne of Peter, Benedict XVI compared the Church to a “boat taking in water on every side.”
Thus, during these discussions with the Roman authorities we want to examine the deep causes of the present situation, and by bringing the appropriate remedy, achieve a lasting restoration of the Church...."
All the councils up to the Second Vatican Council. FYI, the teachings of an ecumenical council are among the highest levels of teaching authority--if not the highest--expressed by the magisterium.
James Martin, SJ