You first need to understand two things to help understand why Jesus had to die.
The weight of sin, and God’s justice.
The weight of sin
The Bible is deadly serious about sin.
Sin is dark and heavy because it separates us from God.
Sin also fractures us, our spirit, our soul, our relationship with others and with ourselves.
This is what the Bible says about sin…
For the wages of sin is death, but the gift of God is eternal life in Jesus Christ our Lord.
Romans 6:23 NKJV
God clearly lays out what sin is in the Bible. And the consequences when we sin.
The Bible says that sin might be pleasurable for a while, but it will leave a bitter taste.
God’s justice
God declares that whoever sins dies, for the wages of sin is death.
And instead of killing everyone of us for our sins, God gave His Son, Jesus Christ, to die in our place.
Instead of us being killed for the sins we’ve committed, Jesus was killed, crucified on a cross and took upon Himself our punishment.
And it had to be Jesus because He was the only one qualified to take on that vital and heavy responsibility.
Jesus Christ was the only person in all of history, in all of creation in heaven and on earth that God deemed appropriate to be the sacrificial lamb, just so that you and I might be saved from eternal torment.
Think about that, even before we were born, even before we consciously and unconsciously, intentionally and unintentionally sinned, God had already made a way out for us.
And His name is Jesus Christ.
Trust Him today as your Lord and Saviour!