Council of Ephesus (431)
Whosoever shall not recognize that the Word of God suffered in the flesh, that he was crucified in the flesh, and that likewise in that same flesh he tasted death and that he has become the first-begotten of the dead, for, as he is God, he is the life and it is he that gives life: let him be anathema.
newadvent.org/fathers/3810.htm
Bishop Fulton Sheen:
“You ask, for instance, “Did God die on the Cross?” The answer, happily, is Yes — as I have said the first answer is usually right. But if you go on and ask “What happened to the universe while God was dead?” nearly all abandon the great truth to which they have just assented, and explain that it was not God who died on the Cross but the human nature God the Son had assumed: which roughly is the Nestorian heresy, condemned at the Council of Ephesus in 431, one year before St. Patrick landed for the conversion of your ancestors and mine. The true answer, you may say, sounds not so very different from the heresy: need we bother the young with technical distinctions of this sort? But upon this distinction our redemption depends and the young are quite capable of seeing the distinction, and of rejoicing in it.”
ewtn.com/library/HOMESCHL/TCHREL.HTM
Catechism of the Catholic Church
468 After the Council of Chalcedon, some made of Christ’s human nature a kind of personal subject. Against them, the fifth ecumenical council, at Constantinople in 553, confessed that “there is but one hypostasis [or person], which is our Lord Jesus Christ, one of the Trinity.” Thus everything in Christ’s human nature is to be attributed to his divine person as its proper subject, not only his miracles but also his sufferings and even his death: “He who was crucified in the flesh, our Lord Jesus Christ, is true God, Lord of glory, and one of the Holy Trinity.”
469 The Church thus confesses that Jesus is inseparably true God and true man. He is truly the Son of God who, without ceasing to be God and Lord, became a man and our brother:
“What he was, he remained and what he was not, he assumed”, sings the Roman Liturgy. And the liturgy of St. John Chrysostom proclaims and sings: “O only-begotten Son and Word of God, immortal being, you who deigned for our salvation to become incarnate of the holy Mother of God and ever-virgin Mary, you who without change became man and were crucified, O Christ our God, you who by your death have crushed death, you who are one of the Holy Trinity, glorified with the Father and the Holy Spirit, save us!”
God died for our sins. Do you really wish to contradict the Council of Ephesus, Bishop Sheen, and the Catechism? Not to mention a vast multitude of others?