My personal opinion, WE ALL ARE GOD’s CHOSEN PEOPLE NOT JUST THE ISREALITES. Evil put in the Bible what they wanted people to believe.
God of Abraham Isaac Jacob

In about a dozen places in the Bible, the Lord God is referred to as the God of Abraham, Isaac, and Jacob (e.g., Genesis 50:24; Exodus 3:15; Acts 7:32). This name of God emphasizes the covenant that God made with Israel and the Israelites’ special place as God’s Chosen People.

God repeated the Abrahamic Covenant to three different generations: Abraham, Isaac, and Jacob were all given the promise of land, many descendants, and blessing. The Lord first calls Abram out of Ur of the Chaldees to the land of Canaan, establishing a covenant with him (Genesis 12:1–3). God reaffirms the same covenant with Abraham’s son, Isaac (Genesis 21:12; 26:3–4), and later with Isaac’s son, Jacob (Genesis 28:14–15). The Lord who established and ratified this covenant is rightly called the God of Abraham, Isaac, and Jacob.