It has nothing to do with what they wanted, but with what the prophecies predicted. The prophecies paint a certain Messianic image, and Jesus wasn't anywhere close to that. He was some guy who claimed to do things that weren't predicted, over a situation that no one was ever told about (hell as punishment for sin), and then died to rectify a situation that no one was told about see by making a change that no one could actually notice in a what that no one was told would ever work (human sacrifice for sin).
But you keep believing what you want. Those dumb Jews just didn't notice who he was and they messed up and killed him. Yep. The people God meant to send him to, and they couldn't even tell. [/sarcasm]
You'd think the fact that it wasn't obvious to any Jews that Jesus was the Messiah would be a clear indication that he wasn't. But I guess that makes too much sense.
Oh, they knew He was the Messiah. It was just that He was not the top-of-the-world kind of Saviour that they desired. He was an embarrassment to the Jewish religious leadership.
Isaiah 53 (New International Version, ©2010)
Isaiah 53
1 Who has believed our message
and to whom has the arm of the LORD been revealed?
2 He grew up before him like a tender shoot,
and like a root out of dry ground.
He had no beauty or majesty to attract us to him,
nothing in his appearance that we should desire him.
3 He was despised and rejected by mankind,
a man of suffering, and familiar with pain.
Like one from whom people hide their faces
he was despised, and we held him in low esteem.
4 Surely he took up our pain
and bore our suffering,
yet we considered him punished by God,
stricken by him, and afflicted.
5 But he was pierced for our transgressions,
he was crushed for our iniquities;
the punishment that brought us peace was on him,
and by his wounds we are healed.
6 We all, like sheep, have gone astray,
each of us has turned to our own way;
and the LORD has laid on him
the iniquity of us all.
7 He was oppressed and afflicted,
yet he did not open his mouth;
he was led like a lamb to the slaughter,
and as a sheep before its shearers is silent,
so he did not open his mouth.
8 By oppression and judgment he was taken away.
Yet who of his generation protested?
For he was cut off from the land of the living;
for the transgression of my people he was punished.
9 He was assigned a grave with the wicked,
and with the rich in his death,
though he had done no violence,
nor was any deceit in his mouth.
10 Yet it was the LORDs will to crush him and cause him to suffer,
and though the LORD makes his life an offering for sin,
he will see his offspring and prolong his days,
and the will of the LORD will prosper in his hand.
11 After he has suffered,
he will see the light of life and be satisfied;
by his knowledge my righteous servant will justify many,
and he will bear their iniquities.
12 Therefore I will give him a portion among the great,
and he will divide the spoils with the strong,
because he poured out his life unto death,
and was numbered with the transgressors.
For he bore the sin of many,
and made intercession for the transgressors.