If the dead in Christ are raised up, and the living in Christ are raised up, and the living that have rejected Christ are obliterated, then no Jew or Gentile will be left on earth. The only ones left are those in the ground that were not in Christ.
Those that went to the wedding are with Christ. On earth, the bricks crumble and the steel rusts, and the trees grow up through the roads. Can you imagine the dead that are resurrected (Rev 20:5 But the rest of the dead lived not again until the thousand years were finished.---) when they see the strange buildings and rusted machinery scattered throughout their world?
After the battle with Gog of Magog there will be plenty of dead to bury.
Isa 49:17-23 Thy children shall make haste; thy destroyers and they that made thee waste shall go forth of thee. Lift up thine eyes round about, and behold: all these gather themselves together, and come to thee. As I live, saith the LORD, thou shalt surely clothe thee with them all, as with an ornament, and bind them on thee, as a bride doeth. For thy waste and thy desolate places, and the land of thy destruction, shall even now be too narrow by reason of the inhabitants, and they that swallowed thee up shall be far away. The children which thou shalt have, after thou hast lost the other, shall say again in thine ears, The place is too strait for me: give place to me that I may dwell. Then shalt thou say in thine heart, Who hath begotten me these, seeing I have lost my children, and am desolate, a captive, and removing to and fro? and who hath brought up these? Behold, I was left alone; these, where had they been? Thus saith the Lord GOD, Behold, I will lift up mine hand to the Gentiles, and set up my standard to the people: and they shall bring thy sons in their arms, and thy daughters shall be carried upon their shoulders. And kings shall be thy nursing fathers, and their queens thy nursing mothers: they shall bow down to thee with their face toward the earth, and lick up the dust of thy feet; and thou shalt know that I am the LORD: for they shall not be ashamed that wait for me.
In your view, how does Isaiah 49 fit into the total scheme of things and the timeline?