Muslims claim that Jesus is Messiah, but not God, and that the stories about Him being God/ the Son of God came about after he ascended into heaven and left Earth.
However, the Old Testament prophecies clearly show that the Messiah would be God. Every reputable scholar admits that the prophecies I am quoting below were written hundreds of years before Jesus was even born. In some cases we have actual copies in the Dead Sea scrolls that were written before His birth.
This first verse shows that one who is God and would be born as a child.
“For to us a child is born,
to us a son is given,
and the government will be on his shoulders.
And he will be called
Wonderful Counselor, Mighty God,
Everlasting Father, Prince of Peace.” (Isaiah 9:6)
Another prophet said that God Himself (me) would be pierced by the inhabitants of Jerusalem.
And I will pour out on the house of David and the inhabitants of Jerusalem a spirit[a] of grace and supplication. They will look on[b] me, the one they have pierced, and they will mourn for him as one mourns for an only child, and grieve bitterly for him as one grieves for a firstborn son. (Zechariah 12:10)
This one, from still another prophet, says that the one who is born in Bethlehem (where Jesus was born) existed before He was born. This is because Jesus is God and he has no beginning.
“But you, Bethlehem Ephrathah,
though you are small among the clans[b] of Judah,
out of you will come for me
one who will be ruler over Israel,
whose origins are from of old,
from ancient times.” (Micah 5:2)