Why did Messiah come?

For this purpose the Son of God was manifested, that he might destroy
the works of the devil. Whosoever is born of God doth not commit sin;
for his seed remaineth in him: and he cannot sin, because he is born
of God.
(1 John 3:8b,9 KJV)

This is how God showed his love among us: He sent his one and only Son
into the world that we might live through him. This is love: not that
we loved God, but that he loved us and sent his Son as an atoning
sacrifice for our sins. (1 John 4:9,10 NIV

But God demonstrates His own love toward us, in that while we were yet
sinners, Christ died for us. Much more then, having now been
justified by His blood, we shall be saved from the wrath of God
through Him. For if while we were enemies we were reconciled to God
through the death of His Son, much more, having been reconciled, we
shall be saved by His life.
(Romans 5:8-10 NASB)