"When you begin redacting or adding things to the scriptures, you're telling God and all of us that you have usurped the authority of God and are changing the covenant"
Query: Are 1 and 2 Maccabees books of the Bible?
Yes or no?
No. But that's not a complete answer, is it.
Christianity was never given authority over the oracles of God - the Old covenant. Paul states flatly in his discourses that those were intrusted to the house of Israel. In trying to add to the old covenant - which in no way affected the church of the new covenant and which the new covenant church had no authority over, the group that did so overstepped their authority - assuming they had any to begin with. There is no authority given to over-ride this condition. If Paul didn't have said authority and noted he did not, how then does anyone with his authority or less have such authority.
That may not be the answer you'd like; but, it is nonetheless the happenstance as noted by no less than an Apostle chosen by Christ to spread the covenant.