Ishmael was the real child of promise, not Isaac

Thank you so much for accepting this challenge, I hope that we will have a productive sharing of ideas.It is widely assumed that Hagar, the slave of Abram, was not his wife, therefore making Ishmael illegitimate. This was not the case because the Bible clearly states that she became his wife; "And Sarai Abram's wife took Hagar her maid the Egyptian, after Abram had dwelt ten years in the land of Canaan, and gave her to husband to be his wife" (Genesis 16:3).According to the Bible Ishmael was born when Abram was 86 years of age (Genesis 16:16) but was 100 years old when Isaac was born (Genesis 21:5). This would make Ishmael 14 when his younger brother was born.When Isaac was weaned (at about 2 years of age) Sarah convinced Abraham to throw Hagar and Ishmael out of the house. Ishmael would have had to be about 16 during this period, but in the Biblical account it describes him as though he were an infant at the time of this event. "And Abraham rose up early in the morning, and took bread, and a bottle of water, and gave it unto Hagar, putting it on her shoulder, and the child, and sent her away: and she departed, and wandered in the widlerness of Beer-sheba. And the water was spent in the bottle, and she cast the child under one of the shrubs (but he was at least 16!!). And she went, and sat her down over against him a good way off, as if it were a bow shot; for she said, let me not see the death of the child. And she sat over against him, and lift up her voice, and wept. And God heard the voice of the lad; and the angel of God called to Hagar out of heaven, and said unto her, What aileth thee, Hagar? fear not; for God hath heard the voice of the lad where he is. Arise, lift up the lad, and hold him in thine hand; for I will make him a great nation" (Genesis 21:14-18). So what we have here is a clear misstep in the telling of the story, which calls into question the reliability of the text as it relates to who was in fact the child of promise, but for arguments sake I will continue.In Genesis 22:2 it says "And he said, Take now thy son, thine only son Isaac, whom thou lovest, and get thee into the land of Moriah; and offer him there for a burnt offering upon one of the mountains which I will tell thee of."When was Isaac Abrahams only son? Ishmael was his only son for 14 years, but Isaac never had that honor.I contend that the names were switched, and I supply this statement as my foundation: "It is related that a renowned traditionalist of Jewish origin, from the Qurayza tribe, and another Jewish scholar, who converted to Islam, told that Caliph Omar Ibn 'Abd al-Aziz (717-20) that the Jews were well informed that Ismail was the one who was bound, but that they concealed this out of jealousy. The Muslim legend also adds details of Hajar, the mother of Ismail. After Abraham drove her and her son out, she wandered between the hills of al-Safa and al-Marwa (in the vicinity of Mecca) in search of water. At that time the waaters of the spring Zemzem began to flow. Her acts became the basis for the hallowed custom of Muslims during the Hajj" (Encyclopaedia Judaica, Volume 9, Encyclopaedia Judacia Jerusalem, pp. 82 (Under 'Ishmael).It is argued that because Sarah was Abrahams first wife that this is the reason for the child of promise coming through her. The Biblical scripture has a contrary view. "If a man have two wives, one beloved and another hated, and they have born him children, both the beloved and the hated; and if the firstborn son be hers that was hated: then it shall be, when he maketh his sons to inherit that which he has, that he may not make the son of the beloved firstborn before the son of the hated, which is indeed the firstborn: But he shall acknowledge the son of the hated for the firstborn, by giving him a double portion of all that he has: for he is the beginning of his strength; the right of the firstborn is his" Deuteronomy 21:15-17.It is for these reasons that I contend that Ishmael was in fact the true child of promise.