The book of Maccabees was scriptural from the beginning and was for all Christians until Luther and the other "reformers" took it out.I believe it was Jerome who put an asterisk by it, wasn't it?
St. Jerome never claimed that they were uninspired as the reformers did. He says he only called them disputed because they were not apart of the Hebrew canon. I know you have read the books of Maccabees so I'm sure why you can see why the Early Church Fathers felt no reason to be compelled to conform to the precendents of the Jews in Jerusalem.
We have to simply come to terms with the fact that the reformers didn't like purgatory so they didn't like Maccabees so they didn't like the Septuagint. The entire New Testament was written in Greek. The Apostles frequently referred to the OT scriptures and encouraged the Early Church t keep to them. If they're writing the epistles in Greek what version of the OT do you think they were expecting them to read; the Greek version. So if the Holy Apostles, or rather the Holy Spirit Himself writing through the Apostles, is writing in Greek encouraging people to read the OT knowing they already were and were going to continue to do so in Greek why would He not point out that they shouldn't treat the Deuterocanonicals as inspired when He says later that all the scriptures are God-breathed?
Furthermore take the Bereans. St. Paul praised them for diligently studying the scriptures. They were in a Greek city so you can bet they had the Greek version of the OT. St. Paul never mentions that he was dismayed about the Bereans dilignetly studying a canon that has uninspired text in them.
Probably because they aren't uninspired.
St. Jerome never claimed they were unispired and every Christian church in history up until some Europeans in the middle ages decided to do their own thing used the text.
There doesn't seem to be much of a case here.