I haven’t done an in depth study of this ... but I have been told the Biblical lineage backs this up. And another reason WHY Islmaist HATE JEWS and Christians. Jews and Christians recognize Isaac as the LEGITIMATE heir to God’s promises to Abraham and Sarah.
I don’t know if one can truly say definitively that the Arab race descends from Ishmael or not, I have read some things which do not back that idea up. However, I do agree with you about the hatred muslims harbor for the Jewish people. They hate the fact that they were “chosen” by God to bring about the salvation of the world. They also hate us Christians, because we believe that salvation is from the Jews. It’s something they cannot accept
I wonder if the arabs realize they are half Jewish? And, yes, their illegitimacy negates any claim to the land that God promised to the Jews.