I did some research and found this answer to your statement;Jesus' last words on the cross, "My God, my God, why hast thou forsaken me?" hardly seem like the words of a man who planned it that way. It doesn't take Sherlock Holmes to figure there is something wrong here.
In Matthew 27:45-46, it says, "Now from the sixth hour darkness fell upon all the land until the ninth hour. 46And about the ninth hour Jesus cried out with a loud voice, saying, "Eli, Eli, lama sabachthani?" that is, "My God, My God, why hast Thou forsaken Me?" If Jesus is God, why would He say this?
First of all, Jesus quoted Psalm 22:1 which begins with, "My God, My God, why hast Thou forsaken Me?". Jesus quoted this Psalm in order to draw attention to it and the fact that He was fulfilling it there on the cross. Consider verses 11-18 in Psalm 22:
Be not far from me, for trouble is near; For there is none to help.12 Many bulls have surrounded me; Strong bulls of Bashan have encircled me. 13 They open wide their mouth at me, As a ravening and a roaring lion. 14 I am poured out like water, And all my bones are out of joint; My heart is like wax; It is melted within me. 15 My strength is dried up like a potsherd, And my tongue cleaves to my jaws; And Thou dost lay me in the dust of death. 16 For dogs have surrounded me; A band of evildoers has encompassed me; They pierced my hands and my feet. 17 I can count all my bones. They look, they stare at me; 18 They divide my garments among them, And for my clothing they cast lots.
The term 'dogs' was used by the Jews to refer to Gentiles (cf. Matt. 15:21-28). His heart has melted within Him (v. 14). During the crucifixion process, the blood loss causes the heart to beat harder and harder and become extremely fatigued. Dehydration occurs (v. 15). Verses 16b-18 speak of piercing His hands and feet and dividing his clothing by casting lots. This is exactly what happen as described in Matt. 27:35.
Psalm 22 was written about 1000 years before Christ was born. At that time, crucifixion had not yet been invented. Actually, the Phoenicians developed it and Rome borrowed the agonizing means of execution from them. So, when Rome ruled over Israel, it became the Roman means of capital punishment imposed upon the Jews whose biblical means of execution was stoning. Nevertheless, Jesus is pointing to the scriptures to substantiate His messianic mission.