Christianity came from roots dating far back into the Jewish religion. As early as Genesis 3,
"15 And I will put enmity
between you and the woman,
and between your offspring [1] and hers;
he will crush [2] your head,
and you will strike his heel."
Even the Jews of Christ's day saw this as a prophecy of the Messiah.
Look at
Psalm 22.
This is a picture of the cross.
Micah 5:2 says, "But out of you Bethlehem, though you are small among the clans of Judah, out of you will come one who will be for me a ruler of all Israel, whose origins are from ancient days".
Bethlehem was the setting of Christ's birth.
Zechariah 9:9
"9 Rejoice greatly, O Daughter of Zion!
Shout, Daughter of Jerusalem!
See, your king [2] comes to you,
righteous and having salvation,
gentle and riding on a donkey,
on a colt, the foal of a donkey."
Ironic that Christ came into Jerusalem riding on a donkey?
Zechariah 12:10 -
10 "And I will pour out on the house of David and the inhabitants of Jerusalem a spirit [1] of grace and supplication. They will look on [2] 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.
God is speaking in this verse. Is it strange that he says that they will mourn for the one they have pierced?
God being pierced? When did that happen?
Isiaiah 53 -
"4 Surely he took up our infirmities
and carried our sorrows,
yet we considered him stricken by God,
smitten by him, and afflicted.
5 But he was pierced for our transgressions (sins),
he was crushed for our iniquities;
the punishment that brought us peace was upon him,
and by his wounds we are healed.
6 We all, like sheep, have gone astray,
each of us has turned to his own way;
and the LORD has laid on him
the iniquity of us all."
This is the very gospel of Jesus Christ.
NOW, what you must understand is that every single quote I just gave you is from the Old Testament (ie. before Christ). Most from tradition are stated to be before 400 BC (400 years before Christ), but even if you don't believe that, the Dead Sea scrolls are dated to 200 - 150 years BC (and they contain the entire Old Testament except for the book of Esther).
Therefore, we have direct prophecies about who the Messiah must be. He must be born in Bethlehem, he comes from the tribe of Judah, he enters Jerusalem on a donkey, he dies for the sins of the people, etc, etc....
So, how could Jesus decided where he was to be born at? How could he have decided his exact way of death? He couldn't have....
The only other option you get is that some clever Jews got together, pieced together a story from all these prophecies, and then went out and preached this fake lie that they knew to be a lie to the result of their repeated imprisonment, beatings, and eventual martyrdom (11 of the 12 disciples were executed). History tells us that these men gained nothing for doing this. Not only this, but their preaching started in a Jerusalem, the city a size of a small town these days where everyone could have known whether or not the story was true or not. Yet somehow, this fake story spread throughout not only Israel, but throughout the Roman Empire (under intense persecution) and became the predominant religion by 300 AD.