O Come, O Come, Emmanuel

Sorry I'm not nearly as reliable as your advent devotional book. I still hope that Holy Spirit is using this to give you a fresh revelation into God's purpose and plans for the Jews. You could also check out Romans 9-11 for more!

Isaiah 7:14 gives a promise that has been fulfilled. It's a well-known and quoted verse.
The next few chapters talk about God using Assyria for His purposes with Israel. I love 10:13 that says it's all according to God's strength and wisdom and understanding. He always, always, always has a purpose for everything He does. Always. :)

I think that 8:17 is a verse that is still going on, because, for the most part, the Lord is still hiding His face from the descendants of Jacob. But just like Isaiah, we can say that we will wait for Him and put our trust in Him.
Jesus told the Jews that they would not see Him again until they recognize who He is--the Messiah! (Matt 23:37-39) There are many Messianic Jews that the Lord is no longer hiding His face from, but I believe that a great revelation is coming to the Jews of who the Messiah is. What better thing to pray for during Advent than that the Jews would come to be gathered as a hen gathers her chicks under her wings and finally say "Blessed is he who comes in the name of the Lord!" ??

Isaiah 9 also has a very well-known and quoted passage. Take note of the verb-tenses used throughout it though. Sometimes it's 'is' but mostly it's 'will be'. I think that means this is a combination of fulfilled promises and ones still to come.
For to us a child is born,
    to us a son is given,
    and the government will be on his shoulders.
And he will be called
    Wonderful Counselor, Mighty God,
    Everlasting Father, Prince of Peace.
7 Of the greatness of his government and peace
    there will be no end.
He will reign on David’s throne
    and over his kingdom,
establishing and upholding it
    with justice and righteousness
    from that time on and forever.
The zeal of the Lord Almighty
    will accomplish this.

You could say that it was all yet to come when this book was written by Isaiah, which is certainly true. But why would they use the present tense for Jesus being born and future tense for the other promises? I think this passage is to be read with the tenses when the child has been born and the son has been given. But the government is not fully on His shoulders yet. The prince of this world still stands in the way. Jesus is not yet called Wonderful Counselor, Mighty God, Everlasting Father, Prince of Peace fully. He is not reigning on David's throne yet, but there will be no end to the greatness or increase of His government and peace.

Again, this is something to pray into. Thank God that the government we have today is not as good as it gets. Remember, God really wants you to partner with Him in intercession. Ask Him to come back and reign on David's throne with justice and righteousness forever. Ask Him to reveal Himself fully as the Wonderful Counselor, Mighty God, Everlasting Father, and Prince of Peace to both yourself personally, the Jews, and the world.

You could even sing the song O Come, O Come Emmanuel as your prayer!
Come Emmanuel and please ransom  the captive Israel. 
Rejoice, rejoice! Because Emmanuel shall come to you, Israel!