After the Confusion of Languages at Babel, Shem’s son Arphaxad and his descendants, who still spoke the original language, probably Hebrew or Aramaic, populated most of the Middle East: Israel, Arabia, Iraq, Jordan, Nth-Africa Syria, Yemen and Oman. Arabian families moved to, and established today’s Bahrain.  Arabs, as the Bible clearly indicates, are a mixture of descendants of 1) Ishmael, Abraham and Hagar’s child, 2) descendants of Abraham’s and Keturah’s 6 children: Zimran, Jokshan, Medan, Midian, Ishbak and Shuah, and 3) descendants of Abraham’s son Isaac and Rebekah who’s twins Esau and Jacob already fought in her womb indicating the bitter struggles between Arabs and Israel.
Genesis 10:22-31 The children of Shem; Elam, and Asshur, and Arphaxad, and Lud, and Aram. 23And the children of Aram; Uz, and Hul, and Gether, and Mash. 24And Arphaxad begat Salah; and Salah begat Eber. 25And unto Eber were born two sons: the name of one was Peleg; for in his days was the earth divided; and his brother’s name was Joktan. 26And Joktan begat Almodad, and Sheleph, and Hazarmaveth, and Jerah, 27And Hadoram, and Uzal, and Diklah, 28And Obal, and Abimael, and Sheba, 29And Ophir, and Havilah, and Jobab: all these were the sons of Joktan. 30And their dwelling was from Mesha, as thou goest unto Sephar a mount of the east. 31These are the sons of Shem, after their families, after their tongues, in their lands, after their nations.