Just

take a second and read it.

The point is made at the bottom.

The Lord your God will raise up for you a prophet like me from among you, from your fellow Israelites. You must listen to him. For this is what you asked of the Lord your God at Horeb on the day of the assembly when you said, “Let us not hear the voice of the Lord our God nor see this great fire anymore, or we will die.”

The Lord said to me: “What they say is good. I will raise up for them a prophet like you from among their fellow Israelites, and I will put my words in his mouth. He will tell them everything I command him. “ But you, Bethlehem Ephrathah, though you are small among the clans 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.” 

Therefore the Lord himself will give you a sign: The virgin will conceive and give birth to a son, and will call him Immanuel. 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. Of the greatness of his government and peace there will be no end. He will reign on David’s throne and over his kingdom, establishing and upholding it with justice and righteousness from that time on and forever. The zeal of the Lord Almighty will accomplish this.

A shoot will come up from the stump of Jesse; from his roots a Branch will bear fruit. 

The Spirit of the Lord will rest on him—the Spirit of wisdom and of understanding, the Spirit of counsel and of might, the Spirit of the knowledge and fear of the Lord—and he will delight in the fear of the Lord.

Four different writers
No contact with one another.
Over the course of close to 900 years.

Sure reads like a hodgepodge of made up stuff doesn't it?

(That's sarcasm just in case you didn't know).

Somebody wanna explain that?

Let alone the fact they came true.