Archbishop Lefebvre believed that the Pope was the Pope, and he wrote near the end of his life that he had never ceased repeating that if anyone would separate himself from the Pope, it wouldn't be him. You seem unable to make a distinction between holding for the possibility that in the future, a pope would be declared not a pope by his successor. That's a possibility (among others).
The Archbishop believed that the Pope was the Pope. He also believed that we should not follow him in his Modernist errors. That's recognizing the pope, but resisting his errors.
You can make this all about +ABL's supposed sede beliefs. But he wasn't a sede. Far from it.
Debating with sedes is futile, because you all are NOT honest.
It's like the Catholic Answers forum. They are tolerant too, of all kinds of ridiculous views that aren't Catholic. I finally gave up trying to reason with modernists and Protestants there. It's the same with sedes here.