[The Urban Sombrero]

No, you thought you'd answered in what you posted. Once Sarah conceived, Abraham sent Hagar and Ishmael away with not much more than a bottle of water. I'm certain it was one of the hardest things he ever had to do. But then, sin has consequences and these consequences were directly attached to his disobedience in having a baby with Hagar. God had plainly said Sarah would be the mother of the child of promise. Seeing as how you revel in notions of compromise, you no doubt would argue that leniency should have been extended. Sarah and Abraham could have said that they were confused about God's instruction, but then Abraham would not have been worthy of his calling. He knew his error and that God had been clear because, God is of that mindset of which you are so opposed, either or. Judgment had fallen on the house of Abraham, and you can bet it hurt both Sarah and Abraham mightily. See, contrary to the rationalizations so many have about standing at the Lord's judgment bar, there will be no negotiations in the time of Judgment. Only the pronouncement of consequences for disobedience. In fact, one will be unable to utter a single word;

The Marriage Supper of the Lamb---Matthew 22:10-12 (KJV)
10 So those servants went out into the highways, and gathered together all as many as they found, both bad and good: and the wedding was furnished with guests.
11 And when the king came in to see the guests, he saw there a man which had not on a wedding garment:
12 And he saith unto him, Friend, how camest thou in hither not having a wedding garment? And he was speechless.

The great nation of Ishmael is excluded from Covenant with God, and as such no more has a part of God's eternal kingdom than does any other lost person. Therefore, the only promise any son of Ishmael might hope to realize is in true repentance and faith in the Lord Jesus.

There was no promise, all God said to Hagar as I pointed out a mere three posts back, (a point BTW you have tried since to commandeer as your own), was that Ishmael's seed would be greatly multiplied. Other than that there is no promise at all. The Arab world is populated with the sons of Ishmael. They are no more blessed or favored by God than are the people of China, (last I checked they were a great nation too, likewise for Russia). The only reason God gives us for making a great (numbers wise only) nation of Ishmael was out of respect for Abraham, his father.

The Abrahamic Covenant was between God and Abraham and was extended for eternity down the rightful blood line of Isaac and the grafted branch only. Genesis 17:19 (KJV)
19 And God said, Sarah thy wife shall bear thee a son indeed; and thou shalt call his name Isaac: and I will establish my covenant with him for an everlasting covenant, and with his seed after him.

God's covenant is not with Ishmael, nor are there any promise/promises as could conceivably be differentiated from any nation other than Israel.

"There you go again."

You balked and squalled "what did God promise Hagar?"

I replied. I did not suggest the promise of Isaac and Ishmael were the same. I simply stated a promise was made. Further, I suggested the Christ rejecting Israelite stands in the same position as the seed of Ishmael, the point of my original question.

What you did above is what you always do: construct a straw man. As I was merely pointing out that God did indeed make a promise to Hagar.