For this to be so, the following would also have to be true:
1. The Jews would have had to (from the very beginning of their existence) intend that their various religious texts, some written generations before Proverbs, be written for the purpose of being a single volume based on a single principle (as you mention) from Proverbs...which by the way was likely not composed until the beginning of the Second Temple era (the post-exile period).
2. Jesus of Nazareth would have to have been accepted as the Messiah by Jews, and Jews would have to change their religion to believe there was such a being as Satan the Devil.
3. Marcion of Sinope, a Christian bishop of the 2nd century, had never become a heretic.
The idea that the Jews set out to write a single volume that never contradicts itself and that was to act as the basis for a religious creed was an idea developed mostly in America during the Second Great Awakening (1790-the 19th century). The idea you are proposing had been suggested in the 2nd century by the famous heretic Marcion, but it would be the New Religious Movements (NRMs) of the Second Great Awakening that would not merely revive it but reshape it to fit their ideals. The NRMs individually proclaimed themselves each to be the restoration of true Christianity, the end of times to be upon mankind, and the Bible as the ultimate form of revelation from God (the Latter Day Saints even went so far as to add a new further written authority).
Even now the Jews don't actually see the Hebrew Scriptures as one book. We see them as three collections of different types of books. And we hadn't settled on making them one volume (which we now call the Tanakh) until the 6th century C.E. when the Masoretes began their work of developing a single and final authoritative text.
Unless any of the writers had an idea that this would ever happen and on top of that knew of the "principle" you mention ahead of time (again you are talking about a proverb which didn't likely see light until after the time of Ezra), then the charge doesn't hold much weight. If they had intended to follow the principle you mention to make a single book, then your claim also falls flat. This would require that the very first Bible writers could foresee events and predict the composition of that post-exile principle. If that had that ability, then you would have a hard time arguing against anything they wrote, but believe me as a Jew when I say that such was never the case.
The idea of a Bible canon was invented by a Gentile Christian bishop of the 2nd century known as Marcion of Sinope. Attracted to Gnostic ideas, Marcion made the first assemblage of holy books for the purpose of acting as proof-texts for his doctrines. His idea was that holy writ was the highest form of divine revelation and that religion can only be based on that (albeit when interpreted through a select group gifted with special insight that others could not possess). Marcion was excommunicated for his teachings that salvation was reliant upon Scripture.
Finally, your argument only works if the original Jewish writers of Scripture intended the Christian scriptures to continue their tradition to create a single volume based on that "foreseen" principle. As you are aware, Jews neither accept Jesus as the Messiah not believe in Satan the Devil's existence. So adding that on to the original point raised doesn't work.
This doesn't mean you don't have a case. What you are arguing very effectively against is the NRM view of Scripture. The Jehovah's Witnesses are one of these NRMs that grew from the Second Great Awakening era. Like the others, they too claim to be the restoration of true religion and that we are living in the last days. They claim they can rightly ignore the great religious authorities who have ties to antiquity by claiming that the Bible is the ultimate form of divine revelation. This is merely a resurrection of Marcionism that taught that ultimate knowledge was granted only to a select group that could decipher salvific instruction from a volume of select holy texts.
It's not the Bible that's the problem. It's this Marcionic concept that the JW religion holds onto. To insist on Marcionism requires that Scripture was written for the purpose of being a single volume, that it cannot contradict itself, and that only those chosen to decipher the salvific message hidden inside can benefit from what is written (along with those who listen to their interpretations).
