Islam Critiqued denies Biblical prophecies; no trace of the Ishmaelite nation?

In answer to the video "Abraham and the Kaaba: From Borrowed Stories to Sacred Scripture"

When in the Torah, God promises -several times over- to turn Ishmael's progeny into a great nation, and a "great nation” in biblical terminology can never be a nation of idolaters, who among the descendants of Ishmael succeeded in fulfilling this promise? Where is the great nation promised to Ishmael, whose numbers would be as vast as the stars in the sky? Where is that great Ishmaelite nation that rose and then vanished without anyone ever knowing about it? The obvious isnt missed by many rabbis in their comentaries of the verse, as they see the rise of Islam as the fulfillement of the promise.

And that is one of the most outstanding manner in which one can verify the truthfulness of God's words, despite their successive destructions and scattering that almost took the Bani Israel to the brink of racial extinction, they have nevertheless remained and regenerated because they are linked with God by a covenant and so is the case of Bani Ismail, despite having almost entirely, besides the scattered hanif remnants, plunged into a state of spiritual ignorance (jahiliya) for thousands of years, nevertheless maintained their ancestral identity.

 In Gen15 Abraham's progeny is promised to dwell between the Nile and the Euphrates and in Gen37:25-28 we read of

"Midianite traders passed by; so the brothers pulled Joseph up and lifted him out of the pit, and sold him to the Ishmailites for twenty shekels of silver. And they took Joseph to Egypt". 

The progeny of Ismail settled in the area from Havilah (beginning from around Yemen all the way to the north of the Arabian Peninsula, among the possible extent of the territory according to Biblical scholars) unto Shur (near gulf of Aqabah at the north east end of Red sea) Gen21:21,25:9-18, which essentially is the Hijaz where the descendants of Ismail have always identified themselves in, whether in ancient history or today. In the early 7th century Syriac Chronica Minora, the author remarks that there is nothing unusual for the Arabs to worship at the  "qubta" of Abraham since they have been doing so since ancient times in hommage to their forefather. In the words of the Jewish historian Josephus who wrote in the 1st century, after speaking of the Arabians of his time as practicing male circumcision at 13 in commemoration of their forefathers Ismail and Ibrahim

"When the lad was grown up, he married a wife, by birth an Egyptian: from whence the mother was her self derived originally. Of this wife were born to Ishmael twelve sons: Nabaioth, Kedar, Abdeel, Mabsam, Idumas, Masmaos, Massaos, Chodad, Theman, Jetur, Naphesus, Kadmas. These inhabited all the country from Euphrates, to the Red Sea: and called it Nabatene. They are an Arabian nation, and name their tribes from these: both because of their own virtue, and because of the dignity of Abraham their father".

This Nabatene country extends on a much larger area than the later northern Nabateans. It goes from the Euphrates to the Red Sea. Further, it is known that the later northern Nabateans with Petra as their capital originated from further south within the Arabian Peninsula. This makes the Nabateans in fact Arabs and it is only an arbitrary designation that created this distinction. Nabateans and the Hijazi tribes shared the same deities and the script used by early Quran scribes closely resembled that of the Nabateans.