[Ali Imran]

The Quran claimed that it is fully detailed. However, readers seeking clarity about which son was sacrificed are left in the dark until the end. 

When it comes to the crucifixion, It does not specify the identity of the innocent man made to resemble Jesus on the cross....it doesnt say anything about Allah perform His houdini act...

The Quran withholds this innocent's name and does not provide additional details about this individual. How can the Quran claim authority over previous scriptures when it omits plenty of crucial information?

Why is it important for us to know which son? The lesson is not about which son, but the obedience of Prophet Abraham pbuh to the commands of God, a lesson which is lost on you since you don't believe in obedience to God's command.

As for the crucifixion, why is it important for us to know exactly what happened? It is sufficient to know that God's beloved messenger was saved.