I understand that this book may have answered your questions regarding the orthodoxy/unorthodoxy of Dignitatis Humanae, but it is hardly a refutation of sedevacantist apologetics.
Am I to understand from this response that you really have no doctrinal refutation for the sedevacantist arguments (except perhaps on this one issue)?
Sean, not sure if you followed the French debates over sedevacantism (or sedeprivationism), or whether you have read Mgr des Lauriers' "cahiers de Cassiciacuм", but essentially the debate between ED/SP trads and sedes has always come down to the issue of religious liberty.
This is unlike both groups debate with the R&R, which is essentially over ecclesiology.
But back to sede apologetics. Most notable (former) sedes in Europe who came over to the then-indult, now-extraordinary form, did so shortly after being convinced that Vatican II's understanding of religious liberty was reconcilable with Catholic Tradition. The Society of St Vincent Ferrer is one good example. L'Abbe Bernard Lucien is another one.
So yes, it comes down to this one work authored by Dom Basile Valuet, a traditional Benedictine ordained personally by Mgr Lefebvre. The great irony is that he originally set out to write his doctoral thesis from the R&R position of attempting to prove a rupture between Vatican II definition of religious liberty and Apostolic Tradition.
The false teaching on religious liberty from Vatican II is only one piece of a large pie. I have no doubt that we, as the "sedes" are right on this point though, as post Vatican II teaching and "papal" statements support our position that Vatican II broke from Tradition on this point.
"Pope" Francis recently taught:
Religious freedom is in fact a fundamental human right and I cannot fail to express my hope that it will be upheld throughout the Middle East and the entire world. The right to religious freedom “includes on the individual and collective levels the freedom to follow one’s conscience in religious matters and, at the same time, freedom of worship… [it also includes] the freedom to choose the religion which one judges to be true and to manifest one’s beliefs in public”
.
SOURCEDo you believe this "Papal" teaching explaining religious freedom is compatible with pre-Vatican doctrine?
This teaching above is but one example among many from the post Vatican II "Popes" that have taught the same.
So, while many apologists for Vatican II will argue that there is an orthodox interpretation for
Dignitatis Humanae, the "Popes" bishops and theologians
after Vatican II all interpreted with the unorthodox interpretation.
For those claiming that the teaching of the Conciliar church on religious liberty is reconcilable with pre-Vatican II teaching, realize that you are opposed by "Papal teaching" from the (your) post V2 Popes, the teaching of the (your) bishops, the "
ecclesia docens," and the consensus of (your) theologians for the last 50 years.