Do Gentile believers have a relationship with Abraham according to Scripture?
Yes, Scripture teaches there is a relationship between Gentile believers and Abraham. Gentiles do not become Jews, since salvation does not change bloodline or genetics. Instead, believing Gentiles walk in the steps of Abraham's faith, which he exercised while uncircumcised, as Galatians 3 confirms: Abraham believed God.
Les explains that people in his classes have said their preacher taught that Christians become Jews, but he rejects that. Salvation is a miracle, yet it does not make a Jew out of a Gentile. That distinction is based on genetics, chromosomes, and bloodline, and God does not change our blood. However, Scripture teaches there is a relationship between Gentiles and Abraham. Les directs listeners to Galatians 3, where Abraham believed God. He notes Scripture keeps repeating this, and he teaches by repetition like the mathematics teacher who raised students' grade levels by reviewing from the beginning. Gentile believers thus relate to Abraham through the faith he had while uncircumcised, not by becoming Jews.