Abrahams people were called Israel.
Jews are not all of Israel. Many Jews were never in Abrahams lineage. Many modern Jews are converts to Judaism and not real Hebrews.
Christ told the Jews in his day that if they were of Abraham, then they would do the works of Abraham.
Others Jews told Jesus that that had never been in bondage to any man.. Which was evidence that they were not Hebrews who were enslaved in Egypt and Babylon.
The Judeans disobeyed the command that forbade the Idumeans and Kenites from entering the congregation of the lord. These become powerful Scribes and Pharasees and perverted the Laws of Yahweh into Judaism..
1 Chr 2:55
55 And the families of the scribes which dwelt at Jabez; the Tirathites, the Shimeathites, and Suchathites. These are the
Kenites that came of Hemath, the father of the house of Rechab.
(KJV)
Kenites are Cains seed. The offsrping of Vipers, the cursed lineage to whom it was forbidden to enter the congregation of the Lord.
Also Yahwehs chosen people are those that do his will.
His chosen are those that know his son, Yahushua HaMeshiach.
shlama
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