“Had they retained their orthodoxy they would be far stronger today. Insofar as they deviated from orthodoxy, they separated themselves from the faith.”
Unfortunately, by retaining their orthodoxy and attachment to the Faith, they were persecuted by modernist Popes.
You don’t get to become a priest without the permission from the pope.
Fellay is in the exact same position he was as if Lefebvre didn’t exist. As well he should. He’s a layperson, no different than you or I.