The emphasis of the narrative is placed on one verse. I'll try to show the pattern.
a. The earth has a single language. v.1
b. The people settle together against God's will by unifying in disobedience. v.2
c. The people resolve to build a worldly kingdom. "Come, Let us..." v.3-4
d. Emphasis--God sees their plot. v. 5 THE LORD CAME DOWN!
c. The Lord resolves to destroy their worldly kingdom. "Come let us..." v. 6-7
b. God scatters the people who have unified against Him. v.8
a. The earth has many languages. v. 9
The emphasis is on the Lord coming down. Why does it say this? We understand from scripture that God is immutable, omnipresent, omniscient, and omnipotent. The focus is on God coming down when men unify in their rebellion against him.
Have you heard all the talk on "one" lately? A one world monetary system, one world court, one world government. Have you noticed that these "one worlders" seem unified in their effort to rebel against the God of Christianity. They all hate Israel for whom God has many promises to yet fulfill. Let me remind those rebuilding the tower of Babel, God is soon to come down and destroy your plot. He sees all you do! Nothing is hid from His sight. Soon the saints and angels of God will shout praises to God when this verse comes true, "And he cried mightily with a strong voice, saying, Babylon the great is fallen..." Revelation 18:2a
Jesus is soon to come back and the architects of this one world foolishness will face Him from whose face the heavens and earth flee. Bless Jesus Christ for whom the saints will shout--"The Lord God omnipotent reigns!