Some will consider the following statement surprising and ironic, but I’d find much more weight behind Viganò’s position if he questioned the legitimacy of all the conciliar popes, rather than just Francis.
Questioning only Francis’s legitimacy makes it seem merely personal, as though the questions attached to him to not, somehow, attach to the rest.
I agree with the sedes that being a Benny gets us nowhere (and feels like controlled opposition to keep us choosing between liberals and conservatives.
Go all the way, or don’t go there at all.