Jacobs' statement in an otherwise insightful quote, that;
"The only reply to [no certainty in any human knowledge, surely no certainty in prescientific traditions] is that traditional knowledge is not human at all but divine and therefore guaranteed to be free from error."
...a 'fundamentalist', absolutist "Maximalist" approach to the Mesorah - is a statement common to other formerly-religious (but far less educated) people who abandoned Torah; to acknowledge history and evolution within the tradition at all (for many) - in any way, to any degree (for most) - wipes away "everything" they ever believed - which is now "all" a lie - despite clearly having not learned everything the Mesorah has had to say about the Mesorah.
It strikes me as tantamount to former "believers" in evolution who become dissenters of it or believers in "Intelligent Design" evolution, who find the slighest fault in their particular approach to the issues of how things occurred, to anomalies in the system, amount to system-wide viruses that cause everything supporting the general theories of evolution to collapse - where, to put it bluntly, evolution AS IT OCCURS has no regard for anyones theories about it. Or physics student in the 80s who comes to find graduate school to be "Iconoclasm 101" subverting much of what they assumed; did the physical universe all of a sudden cease to exist?...Essentially everything must be evolved IN THE WAY THEY BELIEVE IT (or they way they believe they believed it..) or essentially nothing evolves as they see it.
Similarly with the Mesorah, for such a secularized maximalism, everything must in substance and essence be Divine, or in substance and essence, none of it is - no room for "divine sanction" (where God accepts what humans have done or said; HKBH arbited every single step and decision - or none of them), or "Kashering" of previous legalisms or pre-Sinaitic narratives - or arguments in Gemara - even where the Mesorah being defended features these very notions in various "minimalist" perspectives (on aspects ranging from Torah through Gemara).
As deep as the Conservadox Hadar-niks and "Orthoprax" may go in "learning" and behaving in accord with Torah, it is, believed, by most of them, to be in essence thoroughly human - or at best first and foremost human; both the 'tradition' and 'human' being of course understood as materialistically and reductionist as possible so as to uphold one of the essential "modern" bona fides...(where their first allegiance lies). For such reformers, Torah, Revelation, Mesorah, "Jew", Hashem - are mere concepts "boldly and magnificently" (embarrassing chutzpahdik emphasis on "boldly"), redefined anew "every generation" (despite how few of the educated rabbim and the general masses of believing, practicing Jews seem to bother to keep up with the[ir] "corrections" and "''clarifications" of the underpinings...); in this strange, neo-archaic Cosmology, an ever-changing "Creation" of which we are part is the self-evident measure and ruler for determining Change as such;
We may say broadly that free thought is the best of all the safeguards against freedom. Managed in a modern style the emancipation of the slave's mind is the best way of preventing the emancipation of the slave. Teach him to worry about whether he wants to be free, and he will not free himself. Again, it may be said that this instance is remote or extreme. But, again, it is exactly true of the men in the streets around us. It is true that the negro slave, being a debased barbarian, will probably have either a human affection of loyalty, or a human affection for liberty. But the man we see every day--the worker in Mr. Gradgrind's factory, the little clerk in Mr. Gradgrind's office--he is too mentally worried to believe in freedom. He is kept quiet with revolutionary literature. He is calmed and kept in his place by a constant succession of wild philosophies. He is a Marxian one day, a Nietzscheite the next day, a Superman (probably) the next day; and a slave every day. The only thing that remains after all the philosophies is the factory. The only man who gains by all the philosophies is Gradgrind. It would be worth his while to keep his commercial helotry supplied with sceptical literature. And now I come to think of it, of course, Gradgrind is famous for giving libraries. He shows his sense. All modern books are on his side. As long as the vision of heaven is always changing, the vision of earth will be exactly the same. No ideal will remain long enough to be realized, or even partly realized. The modern young man will never change his environment; for he will always change his mind.
Chesterton, Orthodoxy, "the Eternal Revolution"
The whole chapter is much worth reading and quoting. I left a letter out of "slightest fault" above, but many readers (provided I had any), likely read the letter in where it really did belong - for all it's absence. Systems, such as the statement above, are multidimensional, intertextual, multi-cognating (reading and "knowing" the letter is there despite its physical absence), and also abound with contradictions and inconsistancies. "Dispassionate, objective reflection and analysis" a "new revelation" to the Orthoprax and OTD secularists, would indeed "prove" these system-wide problems to be fatal for a claim of Divine engagement - "proofs" of "systemic failure" that similarly abound and flourish in all facets of the abounding, flourishing physical, biological facets of creation and human ventures. One could argue that they would not exist if they were 'perfect' systems - according to notions of perfection formed by imperfect human judgement.