The following verses are determined by Is 53:3-4. But, you are the first to at least acknowledge Is 53:3-4.
First, what God actually did not do, was impute His Son with sin, nor esteem Him guilty of death. But only by sinful men.
Second, what God actually did do, was command His Son to submit Himself into the hands of sinful men, who unlawfully smote Him. Not of God.
And so, the only question is how God, who did not impute Him nor smite Him, did lay the iniquity of the sinful men upon Him?
First, he did not lay their iniquity upon His Son
Himself. But only hands of sinful men did so.
Second, Their iniquity was laid by them only upon His body, not His soul.
And so, God laying the iniquity of the smiters upon His So's body, is not Himself laying stripes upon Him, nor does he lay any iniquity upon His soul.
By command of the Father to submit to sinful men's hands, do they lay stripes on Him and smite Him to a tree. Both the command and obedience are met with death, but not by their own hands.
The Commander does not kill the obedient soldier by sending him into battle, though His command does send him to meet his death.
The Father's hands do not stripe nor smite His Son's body, by commanding submission to the wicked smiters.
Nor does the Father impute the Son with sin worthy of death, by the Son obediently submitting to the sin and unworthy death at the hands of His enemies.
The obedeint Son is not imputed guilty of death, by obedient submission unto death.
The righteous are not imputed with the sin of the unrighteous, who unrighteously slay them: Might does not make right.
Though you do rightly acknmowledge Is 53:3-4, you are now trying to argue, that only sinful men imputed sin to the Son, and wrongly esteemed Him smitten of God, and yet God laying their iniquity upon Him, is imputing Him with sin and smitten of God...
If God imputed the Son with sin, then their judgment would have been right: That He was a blasphemer guilty of death by law of God.
Either men unjustly imputed the Son with sin and unrighteously smote Him,
or God did impute Him with sin and rightly smote Him by law. It can't be both, without God also unjustly imputing and wrongly esteeming the Son smitten by law.
Is 53:3-4 declares the former, not the latter. Therefore, God laying iniquity of the smiters upon His Son's body by obedience, is not imputing His Son's obedient submission with sin and guilt worthy of death.
God commanded His Son to submit into the hands of sinners. God did not command the sinners to smite Him.
The Son obeyed God by submitting Himself into the hands of sinners. The sinners did not obey God by sinfully smiting Him. He was smitten against the law, not by law of God:
Mat 21:37
But last of all he sent unto them his son, saying, They will reverence my son. But when the husbandmen saw the son, they said among themselves, This is the heir; come, let us kill him, and let us seize on his inheritance.
If God imputed His Son with sin, when sending Him into the hands of husbmandmen, then the husbandmen did right to kill the Son.