"Inceldom discussion".
However I will answer. If you believe the legitimacy of the Old Testament read the following:
Isaiah 9 5-6: The Messiah is called Mighty God. "אל גבור" 5 times in the OT,4 about God one about the Messiah. God has the same nickkname at the chapter afterwards.
Jeremiah 23 5-6 The Messiah is called YHHW )יהוה). Which is God's defined named in Hebrew.
Psalms 45 6-8 God anointed by God to be king.
Isaiah 48 12-16: The first and the last, the creator of the world was sent by God and his spirit. But Isaiah 44 24 says God created the world alone thus by combining the two you can conclude that God is a complex unit of a singular God. One God who exist in different forms.
Read Isaiah 52-53, The Messiah dying for the sin of the world. Israel didn't recognize him, he died for their and our sins, he was buried, and it is talking about a single generation.
Psalms 22 the whole story of the crucifixation detiled to the core.
Zechariah 12 10 The Jews cry on the pierced God coming to save them.
Daniel 9 24-26 The Messiah coming before second temple is destroyed. Each week is 7 years (1 day per year Ezekiel 4, Numbers 13).
Micah 5 1-2 The Messiah born at Bethlehem.