If you think the Romans didn’t modify those to suit the Capital C Church based in Rome… Well, it doesn’t matter that much to the discussion because Jewish belief at the time was firmly monotheistic and that is in fact a primary grievance for the Jewish rebellions that happened at the time.
Deuteronomy and Isaiah are Pre-Roman.
And the New Testament was not written by the Romans, but by first Century Christians
If you think the Romans didn’t modify those to suit the Capital C Church based in Rome… Well, it doesn’t matter that much to the discussion because Jewish belief at the time was firmly monotheistic and that is in fact a primary grievance for the Jewish rebellions that happened at the time.
We literally have a surviving copy of Isaiah from before Jesus was even around, nevermind the Roman Church
We have complete manuscripts of the New Testament that are still dated from before Constantine
There is no evidence of the New Testament or Old Testament being altered by the Roman Church