a.) Martin Luther’s translation of the bible included all the books found in Jerome’s canon.
b.) Believers from Melito (2nd century) to Cajetan (Reformation time period) questioned the deuterocanonicals. In fact, the vulgate that the church used contained Jerome’s derogatory prefaces to each of the deuterocanonical books causing doubt as to their canonocity.
c.) Even at Trent we find the bishops/cardinals tasked with voting on which books to include in the canon doubting that the deutero’s should be included.
a) I don’t see your point, Luther placed the deuterocanonicals books between the Old Testament and New Testament (he did this without any authority), He did not believe they were Scriptures. He also oppose Esther, and several NT Books. if Luther had it his way completely, Protestants will have 10 or more books missing from their Bibles.
b) The Majority of Christians believed they were Scriptures. This is can seen by reading the Early Church Fathers. Melito did not include Esther is His canon, but included Wisdom. While St. Jerome expressed some uneasiness about the authority of the Apocrypha at first, later he submitted to the authority of Catholic Church which accepted them. And many of His writings, He used the deuterocanonical as Scriptures. He placed the authority of the Church above his opinions.
c) The Council of Trent did not doubt the deutero. By the the fourth century (Council of Rome 382 AD, Council of Hippo 392 AD, and Council of Carthage in 396 AD), the Church officially announced the deuterocanonical as Scriptures. It was included it the canon. Them “voting” does not prove anything.
You have not proven that the deuterocanonical are not Scriptures. Martin Luther removed them, and so now all of your Protestant Bible (with the exception of a few that included but under the title “Apocryphal”) do not have these books. Those are the facts.
By what authority do you claim only 66 books of the Bible?
As Protestant church historian J. N. D. Kelly writes, “It should be observed that the Old Testament thus admitted as authoritative in the Church was somewhat bulkier and more comprehensive [than the Protestant Bible]. . . . It always included, though with varying degrees of recognition, the so-called apocrypha or deuterocanonical books” (Early Christian Doctrines, 53), which are rejected by Protestants.