It is "all the nations" which come up against Jerusalem (Zechariah 14:1-2). When I restore the "fortunes of Judah, I will gather all the nations and bring them down to the valley of Jehoshaphat (valley of judgment), and enter into judgment with them there" (Joel 3:1-2). It is at that time (Daniel 2:44-45), when the nations are crushed, and then Israel is gathered out of the nations and joined to Judah (Ezekiel 36:24). That has not happened as of yet. And for any of the lost tribes (the house of Israel), who are among the nations, they are told to "come out o her", their religion of Babylon (Christianity), or suffer her plagues (Revelation 18:4). As for the false prophet Paul's "body of Christ", the temple/sanctuary of God, will be the combined house of Judah and Israel (Ezekiel 37:28), living on the land of Jacob, with David being their king. That hasn't happened. God and David are two different entities. All you have now is the tare seed of the devil, and the good seed of the son of man, with their subsequent followers, with their judgment behind the door.