“No mention of Ishamel being a wild ass of a man raising his hand against all other nations (a kotow to Islam).”
Ishmael was not the progenitor of the Arab peoples.
http://www.answering-islam.org/Shamoun/ishmael.htm
http://www.answering-islam.org/authors/cornelius/arabs.html
Some forget Abraham had several sons later after Sarah's death through another legitimate marriage besides Isaac. But The Bible as well as the movie did say Isaac would be the one through which GOD's Covenant would be fullfilled through Sarah. Abraham went on after Isaac and had several more sons. Genesis 25 explains
1Now Abraham married again. Keturah was his new wife, 2and she bore him Zimran, Jokshan, Medan, Midian, Ishbak, and Shuah. 3Jokshan’s two sons were Sheba and Dedan. Dedan’s descendants were the Asshurites, Letushites, and Leummites. 4Midian’s sons were Ephah, Epher, Hanoch, Abida, and Eldaah. These were all descendants of Abraham through Keturah. 5Abraham left everything he owned to his son Isaac. 6But before he died, he gave gifts to the sons of his concubines and sent them off to the east, away from Isaac. 7Abraham lived for 175 years, 8and he died at a ripe old age, joining his ancestors in death. 9His sons Isaac and Ishmael buried him in the cave of Machpelah, near Mamre, in the field of Ephron son of Zohar the Hittite. 10This was the field Abraham had purchased from the Hittites, where he had buried his wife Sarah. 11After Abraham’s death, God poured out rich blessings on Isaac, who settled near Beer-lahairoi in the Negev.
Right. People forget that the name “Arab” is a kind of broadbrush term to cover desert people who appeared on the scene centuries afterwards.