Who died? Who didn't?
Wrong question, the Messiah is not schizophrenic. The Messiah died as human but He did not die as Divine [THE MESSIAH IS ONE PERSON WHO IS SIMULTANEOUSLY TWO NATURES].
“We were reconciled to God by the death of his Son.” (Romans 5:10)
Better to say "We were reconciled to the Father by the death of His Son" since the Father, the Son and the Holy Spirit are all the One God (both individually and collectively) and God cannot have children in the way that humans can. [Much of Scripture (especially the New Testament) is actually written in theological shorthand and it is important to understand the 'longhand' as well as the 'shorthand'.]
“He that spared not his own Son, but delivered him up for us all, how shall he not with him also freely give us all things?” (Romans 8:32)
“My God, my God, why hast thou forsaken me?” (Matthew 27:46)
“But we see Jesus, who was made a little lower than the angels for the suffering of death, crowned with glory and honour; that he by the grace of God should taste death for every man.” (Hebrews 2:9)
“Let this mind be in you, which was also in Christ Jesus: Who, being in the form of God, thought it not robbery to be equal with God: But made himself of no reputation [Greek: emptied Himself], and took upon him the form of a servant, and was made in the likeness of men: And being found in fashion as a man, he humbled himself, and became obedient unto death, even the death of the cross. Wherefore God also hath highly exalted him, and given him a name which is above every name.” (Philippians 2:5-9)
That is both blasphemous and heretical. The Greek does NOT mean 'emptied himself' at all and the Authorized Version's "made himself of no reputation" is a far more scholarly and theologically accurate rendition of the Greek text than the heretical 'emptied himself' that is used by several modern translations whose translators think nothing of sacrificing translation on the altar of interpretation?! To translate the Greek text as 'emptied himself' is, by implication, to call God a liar (Mal.3:6; Jas.1:17)?!
The same identical Being who was in the form of God in verse six, died in verse eight.
Not true. The same identical PERSON (not 'Being') who was in the form of God in verse six died in verse eight, since the Father and the Spirit (who are also 'the same Being') neither incarnated nor died upon a cross?!