Do you really think that GOD will choose Ishmael as the chosen one instead of Issac?

God make covenant with Abraham and Sarah not with Hagar. And on top of that Ishmael was born out of wedlock. It's utterly impossible for Abraham to offer Ishmael as a sacrifice given that he was born out of wedlock because he knows that when you offer something to GOD it must be holy. I remember there is one verse in the OT that mention there should be no bast8rd be brought to him on the altar. For example when one Moses son offer GOD something that is unholy on the avatar he died on the spot