You like to point out that the great guide that Providence sent us in this critical time in Church history in Archbishop Lefebvre is not infallible, but you evidently think that you are, in spite of the fact that so many theologians and saints teach the opposite of what you affirm.

So, the problem isn't just that Archbishop Lefebvre has been turned into some replacement rule of faith, with evidently more "teaching authority" than the Catholic Magisterium (since you can reject the latter, but no the former) ... but that +Lefebvre didn't actually hold/believe what many of his modern-day followers claim he did.  +Lefebvre upheld the main premise (aka the Major) of the SV position, but just rightly concluded that the other premise(s) are not nearly as certain, and therefore the conclusion also lacks certainty.  +Lefebvre did not hold that the free exercise of legitimate papal authority could destroy the Church but "agreed" with the SVs that the papacy is protected by the Holy Ghost to protect it from doing precisely that.