I have taught Isiah, so I have probably read it more than you have. Not only have I read it, I have studied it verse by verse.
Except that you have completely ignore the whole chapters and the complete signs (7:14-25 & 8:3-8), then your biblical "scholarship" is seriously deficient and too selective and biased.
Why do you ignore what it say afterward, from verses 15 to 17. The whole passage to the sign, should include 4 verses (14-17) and not just quarter of it as you and the gospel author have.
Irrelevant. "Sign" refers to a miraculous sign. A prophets wife or a young girl having a son, would not be anything that could point to God/
Again, you are ignoring the war in those 2 chapters.
What bible do you use?
If I remember correctly, it was NASB (New American Standard Bible). I had used the Tanakh NJPS (New Jewish Publication Society). I am not scoffing at your preference, so I am going to compare the two different translations.
NJPS
Isaiah 7:14-17 NJPS said:
14 Assuredly, my Lord will give you a sign of His own accord! Look, the young woman is with child and about to give birth to a son. Let her name him Immanuel. 15 (By the time he learns to reject the bad and choose the good, people will be feeding on curds and honey.) 16 For before the lad knows to reject the bad and choose the good, the ground whose two kings you dread shall be abandoned. 17 The L ORD will cause to come upon you and your people and your ancestral house such days as never have come since Ephraim turned away from Judah—that selfsame king of Assyria!
Isaiah 7:14-17 NASB said:
14 Therefore the Lord Himself will give you a sign: Behold, a virgin will be with child and bear a son, and she will call His name Immanuel. 15 He will eat curds and honey at the time He knows enough to refuse evil and choose good. 16 For before the boy will know enough to refuse evil and choose good, the land whose two kings you dread will be forsaken. 17 The Lord will bring on you, on your people, and on your father’s house such days as have never come since the day that Ephraim separated from Judah, the king of Assyria.”
Do you see the the "he" and "boy" in verses 15 and 16 respectively? Do you think that's anyone else other than Immanuel?
Even your preferred translation, show that the "boy" in verses 15 & 16 is Immanuel. The sign to the birth of Immanuel is not independent to the rest of the sign. Only biased and ignorant creationist, will not see that they are blind.
The boy, Immanuel, has to reach a certain age, before the King of Assyria get involved in the tussle between Judah and the alliance of the "two kings".
That much is pretty clear to me, that there are more to the sign of birth of son.
You have focused too much on what Matthew's say about the sign, and not what Isaiah have to say. That's not good scholarship, that's just your biased ignorance. A good scholar wouldn't focus on one verse, he would read the whole chapter to make sense.
And let's look again at verses 8:5-8, again. I have already posted this passage in my previous reply, but this time, I will use your translation - the NASB:
5 Again the Lord spoke to me further, saying,
Isaiah 8:5-8 NASB said:
6 “Inasmuch as these people have rejected the gently flowing waters of Shiloah
And rejoice in Rezin and the son of Remaliah;
7 “Now therefore, behold, the Lord is about to bring on them the strong and abundant waters of the Euphrates,
Even the king of Assyria and all his glory;
And it will rise up over all its channels and go over all its banks.
8 “Then it will sweep on into Judah, it will overflow and pass through,
It will reach even to the neck;
And the spread of its wings will fill the breadth of your land, O Immanuel.
Do you not see, omega2xx?
This passage (8:5-8), like the one before it - 7:14-17 - connect "Immanuel" to the war in Judah, to the "two kings" and to the "King of Assyria".
Only a blind and stubbornly biased person will not see Immanuel and the war in Judah are all related. Immanuel has nothing to do with Mary and Jesus.
I was "you" 17 years ago. I took what the church taught me, about the virgin birth, without ever questioning the validity of the church or Christian interpretation to the sign. I realised my mistake, when I read the bible again in 2000.
You still have your head buried in the sand. You see little, and you know even less.