Isaiah's words are prophetic not limited as to what would happen to Ahaz, but as verse 11 Ahaz is told "Ask thee a sign of the LORD thy God; as it either in the depth, or in the height above."
But Ahaz answers 12 "I will not ask, neither will I tempt the LORD."
The 'sign' was given anyway. 14 Therefore the LORD Himself shall give you a sign: Behold, a virgin shall conceive, and bear a son, and shall call his name Immanuel.
Immanuel means God with us, and of course that birth did not take place for around 700 years.
15-25 is history now but prophecy to Ahaz. Just as the 'sign' was prophecy to Ahaz and history to us.
Ch*istians of all denominations are being misled. Jews know their scriptures which have been misinterpreted (on purpose)and mistranslated by Ch*stianity.
How can G-d’s promise to Ahaz have anything to do with j-sus? G-d is reassuring Ahaz that he and Jerusalem will be protected. No man-god figures in anywhere.
Isaiah 7:14 refers to a young woman, NOT a virgin.