There is no inkling or slight of intuition that would lead a translator to render the the phrase with the word spared. The proper translation of the phrase reads "...why hast Thou forsaken Me?"
It is a quote from the 22nd psalm - which is speaking of several messianic prophecies - and indeed I also thought it interesting that this was the scripture that Christ quoted direcetly before He died. I think that there are a few reasons for this:
Christ redeemed us from the curse of the Law, having become a curse for us--for it is written, "CURSED IS EVERYONE WHO HANGS ON A TREE"-- in order that in Christ Jesus the blessing of Abraham might come to the Gentiles, so that we would receive the promise of the Spirit through faith.
- Galatians 3:13,14 (NASB)
Christ became accursed, or condemned, or forsaken in the effect that He was bearing the sins of entire world on His shoulders. Because this sin was placed on Him (He did not actually sin) He became separated from Jehova God. Can you imagine the pain and torment and suffering this separation alone must have caused Jesus? Christ had to be forsaken by our sins so that through His suffering, death and ressurrection we might have the hope of heaven and eternal life through the cleansing power of His blood. So as far as whether the verse means forsaken or spared - it defenitely means forsaken, for if Christ had been spared we would be in a world of trouble.
How can God be separated from God was always my next question, and I believe that it is answered with the following verses:
Have this attitude in yourselves which was also in Christ Jesus, who, although He existed in the form of God, did not regard equality with God a thing to be grasped, but emptied Himself, taking the form of a bond-servant, and being made in the likeness of men. Being found in appearance as a man, He humbled Himself by becoming obedient to the point of death, even death on a cross.
- Philippians 2:5-8 (NASB)
Christ, being God, knew what was going to happen, what would occur and what would be necessary for our salvation to be possible. In that effect, being God in the form of a man, He humbled Himself before Jehova God as a man and was obedient to the God's plan of salvation even to the point of dying on the cross - of becoming forsaken and separated for a time from Jehova God.
"YOU HAVE MADE HIM FOR A LITTLE WHILE LOWER THAN THE ANGELS; YOU HAVE CROWNED HIM WITH GLORY AND HONOR, AND HAVE APPOINTED HIM OVER THE WORKS OF YOUR HANDS;"
Hebrews 2:7 (NASB)
But we do see Him who was made for a little while lower than the angels, namely, Jesus, because of the suffering of death crowned with glory and honor, so that by the grace of God He might taste death for everyone. For it was fitting for Him, for whom are all things, and through whom are all things, in bringing many sons to glory, to perfect the author of their salvation through sufferings. For both He who sanctifies and those who are sanctified are all from one Father; for which reason He is not ashamed to call them brethren,
- Hebrews 2:9-11 (NASB)
Further, we can see that it was from the beginning the plan of Jehova God that Jesus would be lowered and made in the form of man, for a little while, carry out the things necessary for our salvation, and the be elevated again to His previous position. All of these things fir together to form a puzzle of sorts that fits together prefectly when we apply all the verses to it and look at the sum of the word concerning this topic:
1. Jehova God had a plan for our salvation from the beginning that included making Christ Jesus for a time lower than the angels.
2. Christ, being God, knew this plan and what it would entail and humbled Himself before Jehova God in order that the plan might be carried out
3. Christ was separated from God for a time, becoming acursed for us and tasting death (not merely physical death) for all that we through Him might live
4. Christ was elevated again to his previous position after all these things had taken place and He had become the author of our salvation
If this helps, or if there are any other questions, please let me know and I'll see if I can help!