this is what I think is going on:
From the perspective of ++Lefebvre, and anyone else who wasn't down with becoming a protestant while keeping the catholic label, Vatican 2 is totally ignorable.
It was, in fact, a pastoral council, whatever that's supposed to mean, and had absolutely nothing binding in it. As much as I've read of it, there is no magisterial statement making the NO incuмbent upon anyone, ever. If it is in there, someone should dig it up so they can argue about it to canon lawyers because they all agree that vatican 2 isn't binding because it wasn't an ecuмenical council, but a pastoral one.
As to Muller's comment, I have no idea wth no canonical status but not excommunicated means practically. They're not excommunicated, but their sacraments are ilicit, but the NO sacraments of "this is the body of Christ; this is the blood of Christ" is somehow valid and licit? Historically, the SSPX is right so far. If they compromise. Then they join the Vatican 2 heresies and are outside of the church, like the Novus Ordites. (Sorry, but from a canonical perspective and a historical perspective, the new church is a heretical sect that accepts all heresies as truth.) Besides, if you keep doing what you've always done, how can you be accused of changing? But that's the way it's been twisted.
I have searched high and low, and have never once encountered any official magisterial docuмent stating that the TLM is not still the official, normal, regular use form of the mass.
Pope Paul VI saying he likes something isn't the same as going through the magisterum and being approved and promulgated properly.
From what I've read, there is absolutely not one single letter in a word in a sentence in a paragraph of any Vatican 2 docuмent that is binding and incuмbent upon all catholics, save what is quoted and then twisted.
In fact, looking back at other councils, the for-real ecuмenical councils, Vatican 2 is totally out of format with previous counsels and teachings. So it is totally baffling why and how any traditional Catholic ever is supposed to be outside of the church. I think this whole thing is a ploy to force SSPX to submit to the new church in order to obtain that most wanted communion with Rome. However, since Rome has willfully put herself outside of the church and called everyone else heretics, there's little or no chance of communion because Rome is still a heretical sect.
It's like arianism all over again...eventually, all this will be set to rights. But for now, it's a giant pain in the patootie.