Gal 1:13They were considerd Jews by the world
For ye have heard of my conversation in time past in the Jews' religion, how that beyond measure I persecuted the church of God, and wasted it: And profited in the Jews' religion above many my equals in mine own nation, being more exceedingly zealous of the traditions of my fathers.
Rom 1:16
For I am not ashamed of the gospel of Christ: for it is the power of God unto salvation to every one that believeth; to the Jew first, and also to the Greek.
The world doesn't write Scripture for God.
2 Pe 1:21
For the prophecy came not in old time by the will of man: but holy men of God spake as they were moved by the Holy Ghost.
A natural gospel after the flesh, written by the will of man, has come full circle.