"They told you that the primary purpose of the death of the Lord Jesus on the cross was to save you"

I believe that I answered your question in my argument. “And I will put enmity between you and the woman, and between your offspring[a] and hers;he will crush[b] your head, and you will strike his heel.” Genesis 3:15In the verse above, we read of a scion that who would appear and reverse the consequences of Adam’s sin. We read of a vowed ‘seed’ that would dismantle the effects of sin. As we go on, we read of this Heir being the central point of the promises which God presented to Abraham, Isaac, and Jacob – that He would defeat his enemies and that he would ultimately bring a grace to all nations of the earth. “I will surely bless you and make your descendants as numerous as the stars in the sky and as the sand on the seashore. Your descendants will take possession of the cities of their enemies, 18 and through your offspring[a] all nations on earth will be blessed,[b] because you have obeyed me.” (Genesis 22:17-18)The expectation of a ‘promised seed’ familiar to the Jewish people as the Messiah, and what is the meaning of that word? According to Wikipedia, it means a savior or liberator of a group of people. There were many prophecies provided by the prophets involving this one who would arrive to reconcile mankind to God. This was the plan that God had from the very start which had come to existence when Jesus was born. That tremendous endeavor of God who through Christ would follow to reunite mankind to Himself again and it is recorded in the gospel of John: ““In the beginning was the Word, and the Word was with God, and the Word was God.” (John 1:1)“And the Word was made flesh, and dwelt among us, (and we beheld his glory, the glory as of the only begotten of the Father,) full of grace and truth.” Jesus was therefore flesh born a man and lived a life in which He was seduced to sin in which unlike humankind he had the capability to prevent the influences of the flesh.Well then, why did He die a sacrificial death in unmitigated capitulation to the desire of God? What is its primary purpose?It was God’s means of opening up a way of salvation and reversing the aftermaths of Adam’s fall. No other mere man could ever have accomplished this because everybody else has “sinned and come short of the glory of God” (Romans 3:23). “We all, like sheep, have gone astray, each of us has turned to our own way;and the LORD has laid on him the iniquity of us all.” Isaiah 53:6“For the wages of sin is death, but the gift of God is eternal life in[a] Christ Jesus our Lord.” Romans 6:23The above verses states that every descendant of Adam is guilty of this curse and the penalty of those offenses is DEATH. Therefore, the punishment must be done by the shedding of blood by a perfect sacrifice.“For the life of a creature is in the blood, and I have given it to you to make atonement for yourselves on the altar; it is the blood that makes atonement for one’s life.[a]” Leviticus 17:11“Do not sacrifice to the LORD your God an ox or a sheep that has any defect or flaw in it, for that would be detestable to him.” Deuteronomy 17:1And last thing, Jesus’ name means “God saves.” The following verse will eventually answer your question.“She will give birth to a son, and you are to give him the name Jesus,[a] because he will save his people from their sins.” – Matthew 1:21(The-Gospel-Truth.info, Jesus.org)