Isaiah connects to the future at Revelation 21 that the mountain of the LORD's house is in the fulfillment in heavenly JerusalemYou are free to believe that if you want to, but that is not what I believe. It is also not what the Bible says about the seat of the government in the last days.
Isaiah 2 King James Version (KJV)
2 And it shall come to pass in the last days, that the mountain of the Lord's house shall be established in the top of the mountains, and shall be exalted above the hills; and all nations shall flow unto it.
3 And many people shall go and say, Come ye, and let us go up to the mountain of the Lord, to the house of the God of Jacob; and he will teach us of his ways, and we will walk in his paths: for out of Zion shall go forth the law, and the word of the Lord from Jerusalem.
4 And he shall judge among the nations, and shall rebuke many people: and they shall beat their swords into plowshares, and their spears into pruninghooks: nation shall not lift up sword against nation, neither shall they learn war any more.
Baha'is believe that the seat of the government has already been established and it is called is the Universal House of Justice (UHJ) located on Mount Carmel in Haifa, Israel thus fulfilling the prophecy cited above.
Daniel 2:44 And in the days of these kings shall the God of heaven set up a kingdom, which shall never be destroyed: and the kingdom shall not be left to other people, but it shall break in pieces and consume all these kingdoms, and it shall stand for ever.
The verse says "shall the God of heaven set up a kingdom, which shall never be destroyed."
The verse does not say "shall Jesus in heaven set up a kingdom, which shall never be destroyed."
Besides Isaiah 2, we find at Micah 4:1-4 in connection to the future here on Earth
A beautiful paradisical Earth as Isaiah's word picture paint for us in the 35th chapter of Isaiah
Jesus did Not set up God's Kingdom but rather asked us to ask God for God's Kingdom to come ( thy kingdom come......... )
Please notice what Jesus does at the end of his 1000 year reign over Earth at 1st Corinthians 15:24-26 _________________