Seraphim,
I do not fully agree with you, mainly in that you claim that Bishop Fellay's Doctrinal Preamble is the not the official stance of the SSPX towards Vatican II. The fact that Rome rejected it does not mean anything - any more than the acceptance or rejection of Rome towards a change in the SSPX's Constitution. The Doctrinal Preamble is the mindset of the SSPX leadership, and they are going to defend it in the next issue of Cor Unum as announced by Fr. Thouvenot himself.
After thinking and praying on this more, I believe that now is the time that priests need to publicly take a stance one way or another. This is no longer a matter of "prudence" as Fr. Rostand would say; this is now a matter of doctrine. We need to challenge our priests. Show them the Bishop Fellay's Preamble. Given them time to study it. Then finally ask for whether they accept it or not. If they accept it, you need to leave your chapel. If they reject it, then they need to take a public stance against it. If those who reject it refuse to speak out against it, then they become no better than those priests who remained silent after Vatican II. As a matter of fact, they are worse because the SSPX priests should know better than the priests at the time of Vatican II. After that, continued attendance at a SSPX chapel run by a priest who rejects the Preamble but refuses to speak out may be interpreted as an act of agreement on your part to the Doctrinal Preamble and to the way your priest is handling the situation. In essence, there would be no substantial difference between your assistance at an SSPX or FSSP Mass.
If the priests decides that he needs to speak out, then be prepared to support him materially.
This was the point I was going to make.
I agree with most of Seraphim's post, and I actually thumbed him up (for what it's worth), but I disagree with 1 point.
Has the SSPX's official mission statement EVER been rubber-stamped by Rome?
A song comes to mind:
(To the tune of, "What's love got to do with it")
What's Rome got to do
got to do with it?
What's Rome but a modernist implosion
What's Rome got to do
got to do with it?
Who needs approval when their faith is broken?
Seriously, though, the SSPX mission statement has nothing to do with what Rome has on their books. Did they approve our mission statement for the past 40 years? But that was our mission statement nonetheless.
And Bishop Fellay DID approve of that Doctrinal Preamble. Rome didn't sign it and give the SSPX a personal prelature, but that doesn't change the fact that +Fellay approved of that text. He did not reject it -- ever.