Ans.But the Jews cannot identify what immediate relief was provided or any special child that was a sign. The verses give no time frame. Also, why is a childbirth itself supposed to be a "sign"? However, if it was a virgin birth, then that most definitely is quite a sign.
Look, I said this before. Saying that anybody fulfills a prophecy is always ultimately a guess, and one can only make their best guess, and people on all sides will disagree based on what they would like to be the truth. First, you see if there is anything that outright excludes the person from being the one prophecized, and if there is, there is no need to go any further. I see nothing that outright excludes Jesus from being the fulfillment of the prophecy. Ay most, one could say that he has not set up a kingdom, but then again, Jesus himself predicted his death and resurrection and predicted his return and how he will rule over all things. So the fulfillment could be said to be started, but not yet completed. There are no specifics given that would exclude this possibility.
Then, we take a look at how much similarities this person has to the prophecy, and that's where the guessing begins.
This seems to be the most rational way to examine something like this.
A. Emmanuel Prophesy:
01. Why would Jews would go "looking for the child"? He had nothing to do with the prophesy. The prophesy was about in what time frame enemies of Ahaz would be vanquished. The Child will not take part in that.
02. The Virgin birth is never intended here and has no connection with the birth of Jesus.
03. Emmanuel meaning God with us, is also no connection with Jesus, as I mentioned that no one called Jesus as "Emmanuel" during his life time, neither Jesus said it was his name.
B. Jesus and his kingdom:
01. This is beside the point, what Kingdom Jesus shall have. The point is that Jesus did not sit on the "throne of David".
02. Jesus' Crucifixion and resurrection is another topic and not connected with our discussion.
03. There are enough evidences that all events recorded in Gospels are for "hearsay", there is not a single "eyewitness" account.
C. How to interpret any prophesy:
01. We should first look in the context and see if there is really a prophesy or not in those verses.
02. Then we should list out ALL the points mentioned in that prophesy and then see how many our "prospective candidate" meets them.
03. If he fulfills "majority and most critical of these properties" then he can be considered a "prospective candidate".
04. But if he fulfills only outer criterion and misses "important points" then he is certainly not a candidate for that.
05. We should be objective and not keep on unnecessarily "multiplying these prophesies".
06. Even if one or two "clear cut prophesies" about Jesus are enough to prove that he was prophesized by OT prophets.
As I told you, I do not deny that Jesus was not prophesized by earlier prophets.
What I want are some clear prophesies about him, that do not pose "difficulties" and you have to twist and bend and frame "strange rules" to fit it on Jesus.
When we will see prophesies about our prophet in OT and NT books, we will see, that we do not need all these twists and bends. And we do not say that OT and NT books are "filled with prophesies" about our prophet.
But let us get over the subject of Jesus and his advent foretold in OT books.