I have another suggestion for seeding other forums, if anybody has time and inclination. Ask people why the SSPX leadership doesn't follow the example of the saints at the Council of Vienne, who put Pope Pascal II on notice that they would refuse subjection to him (i.e. consider him deposed) if he didn't retract his heretical concession on investitures. The story is told here: viewtopic.php?f=11&t=989
Use some juicy quotes. For example:
<< Not content with the dispatch of Bishop Gerard of Angouleme formally to notify the sentence of the council to Henry, Guy, archbishop of Vienne, Paschal’s legate in France, with the Pope’s permission, and the encouragement of the French king, summoned the bishops of the various provinces of France to meet him at Vienne. The outcome of the deliberations of the council was that Henry was solemnly excommunicated by name for his base seizure of the Pope, and for his extorting the investiture concession from him. Paschal was then earnestly implored to confirm their action; and as “most of the princes and nearly all the people,” say the Fathers of the council, “think with us on this matter, do you enjoin them all to help us if need should arise.” In conclusion, “with due reverence,” but certainly with no little firmness, they assure the Pope of their obedience if he confirms their action and abstains from all further intercourse with “the most cruel tyrant,” but if he does not, then, they conclude: “May God have pity on us, because you will force us to abandon our subjection to you.” >>
And << In another letter, Saint Bruno stresses that he only considered heretics those who deny the Catholic principles on the question of investitute, and not those who in the concrete order, pressed by the circumstances, act in a way not in accord with true doctrine27. However, the reservation is not sufficient to exempt Pascal II from the suspicion of heresy, since he, even when the coercion had ceased, refused to correct the evil done.
The Pope knew quite well that Saint Bruno did not shrink from the hypothesis of declaring him destitute, for he resolved to depose the Saint from the influential charge of Abbot of Monte Cassino on the basis of the following allegation:
“If I do not remove him from the rule of the monastery, he with his arguments will take away from me the government of the Church”.
And when, at last, the Pope retracted, before a synod convened in Rome to examine the question, Saint Bruno of Segni exclaimed:
“God be praised! For behold that it is the Pope himself who condemned this pretended privilege (of investitute by the temporal power), which is heretical”.
With this phrase, Saint Bruno for the first time let it be know publicly how much he suspected the orthodoxy of Pascal II. At this his enemies protested energetically; the most outstanding among them was the Abbot of Cluny, Jean de Gaete, “who - we read in Hefel- Leclercq - did not wish to permit that the Pope be accused of heresy”30
Saint Bruno of Segni was not the only Saint of the epoch who admitted the possibility of heresy in Pascal II. In 1112, Archbishop Guido of Vienne, the future Pope Calistus II, convoked a provincial synod, at which appeared, among other bishops, Saint Hugo of Grenoble and Saint Godfrey of Amiens. With the approval of these two Saints, the synod revoked the decrees extorted by the Emperor from the Pope and sent to the latter a letter in which we read:
“If, as we absolutely do not expect, you chose another way, and you refuse to confirm the decisions of our authority, may God help us, for thus you will be separating us from obedience to you.”
These words contain a menace of a rupture with Pascal II, only explicable by the fact that in the spirit of the bishops met in Vienne there were united three notions: in the first place, they were convinced that it constituted heresy to deny the doctrine of the Church on investiture; in the second place, they suspected that the Pope had embraced that heresy, and, in the third place, they considered that a Pope in the eventuality of being heretical, would lose his charge, and should not any more, therefore, be obeyed. >>