Idk what being said."Jew" refers to descendants of Judah, and Judah was a descendant of Abraham,
so technically Abraham was the first Gentile monotheist named in Scripture after the Flood.
All I know is the Oath God made to a Man Known as friend of God . That even His name changed And is also The Father of All His Seed.
That covenant is to the baptism covenant The New And Holy Ghost indwelling.Ti the next Group Jew and Gentile started with half breed Samaritan