To you "Dogmatic Sedevacantists" from a faithful and attentive son of the great Archbishop...
Quoted from "Eleison Comments" #357
The crazy words and deeds of Pope Francis are presently driving many believing Catholics towards sedevacantism, which is dangerous. The belief that the Conciliar Popes have not been and are not Popes may begin as an opinion, but all too often one observes that the opinion turns into a dogma and then into a mental steel trap. I think the minds of many sedevacantists shut down because the unprecedented crisis of Vatican II has caused their Catholic minds and hearts an agony which found in sedevacantism a simple solution, and they have no wish to re-open the agony by re-opening the question. So they positively crusade for others to share their simple solution, and in so doing many of them – not all -- end up displaying an arrogance and a bitterness which are no signs or fruits of a true Catholic. (emphasis mine)
Now these “Comments” have abstained from proclaiming with certainty that the Conciliar Popes have been true Popes, but at the same time they have argued that the usual sedevacantist arguments are neither conclusive nor binding upon Catholics, as some sedevacantists would have us believe. Let us return to one of their most important arguments, which is from Papal infallibility: Popes are infallible. But liberals are fallible, and Conciliar Popes are liberal. Therefore they are not Popes.
Link to letter: http://stmarcelinitiative.com/churchx2019sinfallibilityx2013iii/
This is what my opinion, in general, has been for a long time about the Archbishop's position.
I have read long ago, what some are posting now as evidence to support their sedevacantist (dogmatic) positions, and found them to be what Bp Williamson expresses here.
I believe for one to even begin to understand the Archbishop's position, one can't just take these excerpts out of context of his life's work.