The Deuterocanonicals are rejected by protestants because they claim that they are not included in the original Hebrew O.T. preserved by the Jews. They usually cite Rom. 3:1-2 claiming it states that God used the Jews to preserve His Word; therefore, we know that He guided them in the rejection of the Apocryphal books from the canon of Scripture.
What does Romans 3:1-2 actually say? Does it say that the Jews will actually be the ones who canonize the Old Testament? Does it say that they have the authority to determine the canon over the canon that the Church that Jesus himself established? Jesus says to his New Covenant apostles ‘Whatsoever you bind on earth will be bound in heaven, and whatsoever you loose on earth shall be loosed in heaven.’? (Mt. 16:18-19, Mt. 18:18). Well, here is the actual text of Romans 3:
1 What advantage then hath the Jew? Or what profit is there of circumcision? 2 Much every way; chiefly, because that unto them were committed the oracles of God.
This just says that to the Jews were committed, or given the oracles of God, or Scripture. It does not say that the Jews were given authority to determine the OT canon. Remember these guys also rejected the entire NT canon as well.
But did the Jews regard the Deutero’s as scripture? In Matthew 22:23-28 we read of the Sadducees approaching Jesus and asking him this question: "23 The same day Sad’ducees came to him, who say that there is no resurrection; and they asked him a question, 24 saying, “Teacher, Moses said, ‘If a man dies, having no children, his brother must marry the widow, and raise up children for his brother.’ 25 Now there were seven brothers among us; the first married, and died, and having no children left his wife to his brother. 26 So too the second and third, down to the seventh. 27 After them all, the woman died. 28 In the resurrection, therefore, to which of the seven will she be wife? For they all had her.”
No Protocanonical book has those events, where someone is tortured, and has the hope of the resurrection of life. But it is found in 2nd Maccabees 7 of the deuterocanon. In fact, it is referenced no less than 6 times of the hope of a resurrection of life. There is more mention here [in 2nd Maccabees] of resurrection of life than in all the rest of the procanon Old Testament passages combined. Plus, there is nothing in the protocanonical Scriptures that says people endured torture in the hope of rising again. in addition Heb. 11:35 also references 2nd Maccabees regarding enduring torture in the hope of rising again."