Was it a sacrificial death required by the new covenant?

Who said that Jesus was resurrected or even dead ? Many believe that Jesus had not been crucified.

Jesus is the Son of God, God born in the form of man. He came into this world to save mankind from their sins, So that all who will believe in him will not perish but have ever lasting life.

Yes he took our sin upon hisself.

Jesus is the Son of God, our Savior, the only way to heaven.

Matthew 3:15-17
When Jesus was baptized by John, "to fulfill all righteousness," "at that moment heaven was opened, and John saw the Spirit of God descending like a dove and lighting on Him. And a voice from heaven said, "This is my Son, whom I love; with Him I am well pleased."

Acts 4:10-12
..."Then know this, you and all the people of Israel: It is by the name of Jesus Christ of Nazareth, whom you crucified but whom God raised from the dead, that this man stands before you healed. He is the stone you builders rejected, which has become the capstone. Salvation is found in no one else, for there is no other name under heaven given to men by which we must be saved."

Luke 24:44-47
After His resurrection, Jesus said, ""This is what I told you while I was still with you: Everything must be fulfilled that is written about me in the Law of Moses, the Prophets and the Psalms."
He told them, "This is what is written: The Christ will suffer and rise from the dead on the third day, and repentance and forgiveness of sins will be preached in his name to all nations, beginning at Jerusalem."

John 6:32-33
Jesus said to them, "I tell you the truth, it is not Moses who has given you the bread from heaven, but it is my Father who gives you the true bread from heaven. For the bread of God is he who comes down from heaven and gives life to the world."

Also--John 6:35-40

Heb 9:22
22 And almost all things are by the law purged with blood; and without shedding of blood is no remission.
(KJV)

Abel understood this. Cain didn't. Sin is a capital offence, and a penalty must be paid. Animal sacrifices in the OT were symbolic, pointing to the true sacrifice that God himself would give to pay the penalty. In the NT a better covenant is revealed, Jesus paying the debt by His death, and rising from the dead to guarantee the promises of God.

Jesus was the only one who could die and forgive the sins of man. You ask how one person could do this, the reason is because if you were to put jesus the son of god on a scale and on the other side you put humanity, jesus would heavily outweigh the scale, not because he was sinless but because of who he is.

If you are anyone else wants to be a potential Son of God, Jesus Christ had to be the first to conquer Death. He became the First of the First fruits of God.