Williamson is not made the excuse, he makes himself the reason why the SSPX cannot move forward.
It is his insistence that the Holy See retrovalidate his consecration that is holding up everything. The Holy See cannot declare his consecration valid without giving a prefabricated excuse for schism to every leftist bishop in the world. He knows this and he is insisting on this point because he knows that if the SSPX and the Holy See reconcile, his three brother bishops will retain their office while he will most likely be laicized.
But any fraternity may have a weak link.
I agree. That is why I, unlike some, do not like to generalize about the entire SSPX due to the actions of a few members.
He has never been representative--and even Rome knows this.
I agree. The question arises: why then does the SSPX defer to Williamson's agenda?
Because if Fellay et al. overruled him, he would create a schism in the SSPX and greatly damage the society.
This is why Hoyos negotiates cordially with the other three bishops, but not with him.
I agree. Williamson has basically told the Holy See that Williamson, who has never been in communion with the Holy See at any time in his entire life, gets to dictate what the Holy See considers valid or invalid.
There is no point in talking to someone who only listens to himself.