Secondly...
Secondly, the object of the sacrifice was, to associate it with the life of the great Apostle, so that humanity in its sympathy towards the tragic event may give due admiration to the Apostle, but there, in this case, admiration would have gone only to ISMAEL as being the victim of Abraham's personal interpretation of his dream, which the people could have mistaken to be fantastic, and Abraham would have been condemned for his conduct, which in fact was a unique instance of perfect submission of God's will.
And over and above the other reasons, the sacrifice, if it had been left to be enacted by Abraham, would have been a sheer waste, for no universal religion had yet been regulated and enforced for the human race ad a whole, for mankind as a whole to be drawn to it, through its sympathy towards the event.
Moses had yet to present the Ten Commandments and Jesus had to revive the teachings of Moses after they had been corrupted, and yet when the teachings of all the apostles from God got corrupted, Muhammad the Last Apostle of God, the 'MAETREA' foretold by BUDDHA, the 'Comforter' the 'Holy Ghost' and the 'Spirit of Truth' prophesied by Jesus, to abide with mankind for ever, had yet to come.
And the Great Sacrifice was then to be offered for only then the human sympathy, for the hear ending sufferings of the Great Divine and his faithful comrades, would lead mankind as a whole towards the universal religion. Islam is the only divinely revealed and perfectly regulated code for human discipline cumulative of the teachings of all the apostles of God and which contains the Truth which exposed piecemeal by the other prophets in different ages, to different people, in different languages.
The Greatest of the Sacrifices ever offered by any man, would naturally be for the sake of a religion meant for the man race as a whole, and it could be offered by the one whose live would be, not for himself but for the fulfillment of the Mercy of the Lord unto the whole of Mankind.
The Failure Of Judasim and Christianity The purely monotheistic faith preached and practiced by the great Israelite prophets Moses and Jesus, had totally failed to exercise any more of its correct influence on the minds of the Jews and the Christians who had gradually sunk deep in all sorts of idolatrous beliefs and pagan practices.