.
I'm just seeing this now for the first time, and my immediate impression is as follows:
It is unbecoming of 'traditionalists' to squabble over nuances, and it makes a lot of young Catholics want nothing to do with 'traditional Catholicism' (as they see it) when there is so much bad temper attached to its discussion.
IMHO sedevacantists are especially prone to stir up controversy where none really needs to exist, truth be told.
I have not read what W had said, but I know he is basically solid in such matters as regards the pastoral care of souls (something he has a lot of experience in), and he would not be telling them things that would be dangerous to their faith.
In a not-too unrelated vein, it is most noteworthy to me to see the SSPX persistently driving to make inroads of friendship with the conciliar Church all over the world, such that for example, +Fellay et. al. would denounce the consecration of Bishop Faure saying that it is in no way the same kind of thing that the 1988 consecrations of the Four SSPX bishops was (which is a lie because it is precisely the same kind of thing). And they say this (and so many other things) because they don't want to garner the ire of the conciliar Church. And therefore, we can expect that there will not be any continuation of the Line of ABL through +Fellay, +de Mallerais or +de Galarreta, but ONLY through +Williamson, and therefore, the words carved on the headstone of ABL, "Traddidi Quod Et Accepi," is only being fulfilled by ONE of his 4 successors, and the other three are dead in the water for they will have to answer for their malfeasance at their own particular judgments.
EVEN SO, they are at odds with another traditional group of Catholics who are faithful to Tradition in every way even while they get along fine with the local bishop (something the XSPX highly desires to achieve!) and have a high reputation in their area even if the SPLC and the ADL broadbrushes them as "one of the dirty dozen." For that's a moniker the prospect of receiving that strikes the XSPX to the bone with terror.
It is of no small consequence then, that this same XSPX hurls barbs of 'heresy' at other traditional Catholics for no constructive reason and in regards to things that are not really a big deal in the greater scheme of everything.
So that +Sanborn appears here to be acting in much the same way as the XSPX does, toward other traditional Catholics, making an overall bad impression for our youth who would be good and faithful.
.