It was not written by NT Christians - so it is not part of the NT.
Christians have no authority over the OT - and cannot change it.
Josephus informs us that the OT was canonized over 300 years before the time of Christ and kept in the Temple as such.
That makes it difficult to add 2 Maccabees to scripture
Hmm - it is under the title "Communion with the Dead" in the Catechism. Call it what you will.
2 Macc 12 calls it prayers for the dead. But 2 Macc 12 also does not claim to pray TO anyone but God Himself - not the dead.
In 1 Thess 4:13-18 scripture calls them "the dead in Christ"
In John 10 Christ says "Lazarus is dead"
And in the resurrection 1 Thess 4 says "the DEAD in Christ shall rise first".
So there is that.
Is 8 says not to consult the dead on behalf of the living.
Those Bible facts "do not change" just because someone objects to them
The saints aren't dead. They are alive in Christ.
Not a single text calls the "dead in Christ" (as 1 Thess 4 calls them) -- "The Alive in Christ".
I prefer scripture
BTW even the 2 Macc book calls them "the dead".
Notice that in 2 Macc 12 the dead are called "the dead" not "The alive in Christ"
43 And making a gathering, he sent twelve thousand drachms of silver to Jerusalem for sacrifice to be offered for the
sins of the dead, thinking well and religiously concerning the resurrection,
44 (For if he had not hoped that they that were slain should rise again, it would have seemed superfluous and vain to
pray for the dead,)
We have been over this before
And each time we clearly see - that those facts listed above "do not change" just because someone objects to them.
- Christians have every authority over the Old Testament
Not true. Christians did not write it. Christians were not inspired to write it. Christians did not compile it. All of it was complete for over 300 years prior to the time of Christ as per the custodians of that OT text that were doing that job centuries before Christ.
Flavius Josephus is not a reliable source
He is more Jewish than the late coming groups that rise up centuries after the time of Christ.
but actively prejudiced against Christians
Christians did not author the Septuagint or the Hebrew Bible or the OT. Josephus was not writing his history "to go after Christians".
History does not change just because someone objects to it.
I don’t understand why you and other polemicists cannot simply respect the doctrinal differences between your church and the liturgical churches and leave us in peace.
It is your claim that you don't have "peace" when you find out that someone differs with your suggestions? seriously?