Benedict couldn't validly renounce his office, because he ALSO had a defect of consent, being he ALSO never intended to be an orthodox, catholic pope. Same applies to JP2, Paul 6 and John 23. All of these anti-popes were in favor of V2 and "updating the Church for modern times". That's heresy.
Exactly right. This started with Roncalli who clearly and publicly laid out an agenda to transform the Church.
It's too bad that +Vigano has distanced himself from "the sedevacantists" in this post. While he says that the root cause goes back to V2 and the pre-Bergoglian V2 papal claimants are responsible for it, he seems afraid to trace this backward to all these guys.
It's clear to me that Roncalli, Montini, Wojtyla, Ratzinger, and Bergoglio have been willing and conscious agents for the deliberate, planned, pre-meditated destruction of the Church by its enemies. These are not just some liberal-minded Modernist types who happened to be elected to the papacy. And I also believe that they're not even material popes because Siri was the legitimate pope (canonically) until his death in 1989.