At the Walton, KY, SSPX parish............1st it was the change in the rubrics - e.g. , the standing instead of kneeling at certain times during the Mass , then the pastor accepting permission from the diocesan modernist 'bishop' to witness sspx weddings, now no obligation under pain of mortal sin to attend Ascension Thursday Mass, etc.......even most recently allowing N O priests in the sanctuary during a nuptial Mass.
Marcel Lefebvre - Econe, July 29, 1976............"That the Conciliar Church " (as Msgr. Benelli himself called the Church in his letter to the Archbishop in June of '76) , " is a schismatic Church because it breaks with the Catholic Church that has always been. It has its new dogmas, its new priesthood, its new institutions, its new worship, all already condemned by the Church in many a document, official and definitive.
The Church that affirms such errors is at once schismatic and heretical. This Conciliar Church is, therefore, not Catholic. To whatever extent Pope, Bishops, priests, or faithful adhere to this new Church, they separate themselves from the Catholic Church. Today's Church is the true Church only to whatever extent it is a continuation of and one body with the Church of yesterday and of always. The norm of Catholic faith is Tradition. The demand of His Eminence Msgr. Benelli is, then , illuminating: submission to the Conciliar Church, to the Vatican II Church, to the schismatic Church. For our part, we persevere in the Catholic Church, by the grace of Our Lord Jesus Christ and the intercession of the Blessed Virgin Mary."