Just read the whole chapter in its full context:
Verse 1-2, about spiritual worship without physical temple (thats what Christ preached)
Verse 3-6 distaste of God with Israel and warning about coming judgement (thats what Christ preached)
Verse 7-14 about the birth of Christ and the joy in Jerusalem
This does not refer to the birth of Christ.
Context:
7 Before she travailed, she brought forth; before her pain came, she was delivered of a man child.
8 Who hath heard such a thing? who hath seen such things? Shall the earth be made to bring forth in one day? or shall a nation be born at once? for as soon as Zion travailed, she brought forth her children.
9 Shall I bring to the birth, and not cause to bring forth? saith the Lord: shall I cause to bring forth, and shut the womb? saith thy God.
10 Rejoice ye with Jerusalem, and be glad with her, all ye that love her: rejoice for joy with her, all ye that mourn for her:
11 That ye may suck, and be satisfied with the breasts of her consolations; that ye may milk out, and be delighted with the abundance of her glory.
12 For thus saith the Lord, Behold, I will extend peace to her like a river, and the glory of the Gentiles like a flowing stream: then shall ye suck, ye shall be borne upon her sides, and be dandled upon her knees.
13 As one whom his mother comforteth, so will I comfort you; and ye shall be comforted in Jerusalem.
14 And when ye see this, your heart shall rejoice, and your bones shall flourish like an herb: and the hand of the Lord shall be known toward his servants, and his indignation toward his enemies.
Verse 15-17 about the destruction of Israel (66-70 AD)
Yea? Prove it.
In Context"
15 For, behold, the Lord will come with fire, and with his chariots like a whirlwind, to render his anger with fury, and his rebuke with flames of fire.
16 For by fire and by his sword will the Lord plead with all flesh: and the slain of the Lord shall be many.
17 They that sanctify themselves, and purify themselves in the gardens behind one tree in the midst, eating swine's flesh, and the abomination, and the mouse, shall be consumed together, saith the Lord.
This did not happen yet. If you think it has, it's your burden to prove it.
Verse 18-20 about the spreading of the Gospel to nations, Greece and Asia Minor named specifically as Paul's main field of work
18 For I know their works and their thoughts: it shall come, that I will gather all nations and tongues; and they shall come, and see my glory.
When has God gathered all nations and tongues? Once they are gathered, they shall come, and see His glory. When did this happen?
19 And I will set a sign among them, and I will send those that escape of them unto the nations, to Tarshish, Pul, and Lud, that draw the bow, to Tubal, and Javan, to the isles afar off, that have not heard my fame, neither have seen my glory; and they shall declare my glory among the Gentiles.
When have those that escaped to Tarshish, Pul, and Luci and those that draw the bow to Tubal, and Javan, and to the isles afar off, have proclaimed His glory among the Gentiles? No assertions please, just the facts.
20 And they shall bring all your brethren for an offering unto the Lord out of all nations upon horses, and in chariots, and in litters, and upon mules, and upon swift beasts, to my holy mountain Jerusalem, saith the Lord, as the children of Israel bring an offering in a clean vessel into the house of the Lord.
Verse 21-24 about continuous worship of nations before God and eternal remembrance of what happened to disobedient Israel in great judgement
Here is what the verses 21-24 state:
21 And I will also take of them for priests and for Levites, saith the Lord.
22 For as the new heavens and the new earth, which I will make, shall remain before me, saith the Lord, so shall your seed and your name remain.
23 And it shall come to pass, that from one new moon to another, and from one sabbath to another, shall all flesh come to worship before me, saith the Lord.
This has already been discussed in detail.
24 And they shall go forth, and look upon the carcases of the men that have transgressed against me: for their worm shall not die, neither shall their fire be quenched; and they shall be an abhorring unto all flesh.
Do not stumble on details, its a prophecy, not a newspaper.
It seems to me you are the one stumbling on details.