God stepped up himself because Jesus IS God. Has always been God and died before the begiinnging of the world. He knew what was going to happen and stepped up to the mark to save us. So God himself came in the flesh to be a servant Read the letter to the Philippians Ch2
I guess that you have yet to realize that the bulk of the Bible was forged and we have to apply reason and logic to it's words. It cannot be read literally and make sense.
You have decided to ignore these thinking gifts that God gave you and would prefer belief in the un-proven and un-knowable.
How can Jesus live before his mother did?
Can a God sacrifice himself to himself?
How does that work? Sacrifice has to have a lose or something of value given away to be a sacrifice. Right?
What did God give up. Nothing. He just made himself the hero of all Christians. Self aggrandizement to the max.
Your concept is just weird. You have God saying he has to die for his creation but not really die. Nothing changed for him so there is no lose or sacrifice.
Regards
DL