Well the CMRI in the sixties were a group as part of the Blue Army teaching devotion s such as the rosary and the apparition at Fatima. They saw the dangers of Vatican II and at the time had an elderly priest exiled but the conciliar church. How would you like them to proceed. They had no access to Arb. Lefbevre. and they had a group of faithful Catholics who had the right to Mass of their baptism. The cannonists teach that it is not schismatic to disobey a Pope if they find something about his election or validity doubtful.
How would I have liked them to proceed? I would have liked for them to do something similar to what we did in those days, search for other priests until one was found, then search some more and keep searching until God provided for you. Not that he had to mind you, he already had priests, which gives him even less reason to break all the rules no matter what, so he could become one.
Heck, we drove 700 miles one way for Mass 5 or 6 times, the first time not knowing for sure if we'd even find the True Mass and sacraments when we got there - better to do that then do what Schuckardt did. At least he had priests, that was more than we had in our neck of the woods.
In order to keep the faith it was and remains essential to disobey the pope, so it is not about disobeying the pope to the point that you do what Schuckardt did. There can be no justification in that, especially when you already had priests who were already taking care of the sheep. How anyone could possibly think his schismatic actions could be justified is beyond me - especially since he already had priests!
Schuckardt and his little group had priests, had the sacraments, had the Mass, he and his little group had what they needed - but no, he willingly threw that all away.
Stubborn why is 1971 the year for cutoff for legitimate priests? Where in the US could Catholics attend the Mass of their baptism as they are entitled to under canon law. Name a diocese or religious order where the CMRI faithful could practice their faith whole and entire in 1971? Or lets your parlance, where was their a legitimate non-Chushingite organization attached to visible post-conciliar Church?
You are on the wrong track. You are not even on the same track as CMRI here.
From my experience, by 1971 there was no place in any diocesan church where you could assist at the True Mass - that is only based on my experience. There was however many hold out priests whom were either kicked out or left the diocesan structure or took early retirement rather than accept the NO. But no matter, the fact remains that because he had priests, he had no reason at all to find a Schismatic bishop to ordain and consecrate him so HE could save the whole Church. And even if he had no priests except for a few times every other month, that's how it goes, it's certainly does not give justification to do what he did.