“Right, but those with limited understanding of history and demographics want to classify all Arabs as descendants of Esau. Or possibly Ishmael, which is what the Arabs believe.”
Agreed. The Bible itself describes the Arabians as a separate and distinct group.
However, I hold that the Arabs are not descendants of Ishmael.
http://www.answering-islam.org/authors/cornelius/arabs.html
There are no doubt many Arabs descended from Esau and/or Ishmael, but so what?