The Gentiles who were not Christian because they had not yet known they could be were glad when they found out. And many of them believed and then became Christian.But that is false. Gentiles are called gentiles even though they were Christians.
Act 13:48 And when the Gentiles heard this, they were glad, and glorified the word of the Lord: and as many as were ordained to eternal life believed.
Act 13:49 And the word of the Lord was published throughout all the region.
Act 13:50 But the Jews stirred up the devout and honourable women, and the chief men of the city, and raised persecution against Paul and Barnabas, and expelled them out of their coasts.
Act 13:51 But they shook off the dust of their feet against them, and came unto Iconium.
Act 13:52 And the disciples were filled with joy, and with the Holy Ghost.
Act 14:1 And it came to pass in Iconium, that they went both together into the synagogue of the Jews, and so spake, that a great multitude both of the Jews and also of the Greeks believed.
Act 14:2 But the unbelieving Jews stirred up the Gentiles, and made their minds evil affected against the brethren.
Act_15:3 And being brought on their way by the church, they passed through Phenice and Samaria, declaring the conversion of the Gentiles: and they caused great joy unto all the brethren.
Even after conversion these believing gentiles are still called gentiles.
Same thing about the Jews and the Greeks. Once they believed they were no longer Jews and Greeks. Now to you they may still be Jews. But not to God. Why is this so hard to understand? I feel like I'm teaching grammar school kids how to read.