The Jews trace their lineage back to Abraham who originally came from what's now Iraq. His descendants grew into many millions. It took a lot of marriages to grow that much and they didn't all come from Abraham's line. God told them to marry within their own people but that wasn't easy. 2 generations later, when Jacob moved them all to Egypt there were only 76 of them. That would require a lot of inbreeding by the time they came out 400 years later numbering a couple million. They did a lot in marrying outside the family.
"My understanding", Jews and Muslims both trace back to Abraham. The Jews via Isaac. The Muslims via Ismael.
True. This is what the Bible says about Ishmael:
11 And the angel of the LORD said to her, "Behold, you are pregnant and shall bear a son. You shall call his name Ishmael, because the LORD has listened to your affliction.
12 He shall be a wild donkey of a man, his hand against everyone and everyone’s hand against him, and he shall dwell over against all his kinsmen."
"over against all his kinsmen" means at odds with them all. From the very beginning, the Arabs have been troublemakers.
