The "roots" of an invented dogmatic sedeism which I already said I don't believe in?
Why would I care about the history of people whom you pretend are related to me but are not?
Are you aware of how absolutely unhinged you sound?
I am aware I sound unhinged to you, and probably to all dogmatic sedes, but in your condition what you cannot grasp is that like protestants can trace their doctrine back to a man, dogmatic sedes trace theirs back to a man as well. In your case, if you did your home work, you'd find out that your dogmatic sedeism can be traced back to Bishop (then Father) Sanborn. For you, that is the origin of your opinion-turned-de fide-doctrine because he was the first one to promote the idea.
And who knows, due to their sins perhaps the conciliar popes have not been popes - that still does not give anyone a reason or the right to decide the status of popes, or to go around blabbing "he is not the pope" and omit his name from the canon of the Mass etc. It's not complicated, if you disagree, you're a dogmatic sede.
For our part, we pray for him, we warn others of the popes' heresies and errors and warn them not to follow them. Before God, that is pretty much the extent of our religious obligation and responsibility. Dogmatic sedes cannot get themselves to do this. Can you do this?