Isaiah 7's "God with us" Immanuel
It's interesting that several commentators on Isaiah 7, in major evangelical commentaries, go along with apologizing for Isaiah 7:16. Expositors, NAC. This verse in no way indicates that Isaiah had to have a child or Ahaz had to have a child. If anything it is vague enough to include a child later, even the Christ child. God has already rejected Ahaz, there is no reason that he has to prove something to him by having an immediate fulfillment of verse 16. While verse 16 is a part of the preceeding, it is best to take it as a later fulfillment, along with teacher John Oswalt, in his work on Isaiah 1-39.