Not to press you or proselytize you, but what is it about Matthew and Isaiah that you don't like?
There are many issues I have with gospel interpretations of Isaiah’s original sign.
For one, the gospel (Matthew 1:22-23) only focused on one verse, whereas the original sign include 4 verses as a complete sign - so to understand the context of sign, Isaiah 7:14-17 must be read as whole.
Leaving out 3 verses, the gospel author was is cherry picking, hence being dishonest with his interpretation.
The sign also clearly indicated it was about the war Ahaz have with his neighbors, Pekah and Rezin (Isaiah 1), and the sign was about WHEN Assyria would intervene and attack the two kings.
The WHEN (Assyrian intervention, 7:17) will occur is when the boy (Immanuel) reach a certain age 7:15 & 7:16.
Isaiah 7:14-17 make it very clear that it had absolutely nothing to do with Jesus and Mary.
Isaiah 8:3-4 is a similar sign, also related to when Assyria will intervene in Ahaz’s war with Israel and Aram. The name Immanuel is even mentioned again in connection to Assyria intervention, read Isaiah 8:6-8:
“Isaiah 8:6-8” said:
6 Because this people has refused the waters of Shiloah that flow gently, and melt in fear before Rezin and the son of Remaliah; 7 therefore, the Lord is bringing up against it the mighty flood waters of the River, the king of Assyria and all his glory; it will rise above all its channels and overflow all its banks; 8 it will sweep on into Judah as a flood, and, pouring over, it will reach up to the neck; and its outspread wings will fill the breadth of your land, O Immanuel.
Not once, did any call Jesus “Immanuel”, but twice Immanuel was mention in connection to Ahaz, to the two kings, and to the king of Assyria.
So for any Christians (including whoever wrote gospel of Matthew) who ignored the whole sign by cherrypicking the verse, and claiming them to be Mary and Jesus, aren’t being honest with their interpretations.
It was re-reading passages (back in 2000) from both Isaiah (7 & 8) and Matthew’s version, together, that made me doubted the New Testament for the first time.