Summary
God comes down not to inspect the scenario, but to thwart it. His method is perhaps surprising: he will confuse their language. Why not simply topple the tower? Because that would solve the problem only temporarily. Towers are replaceable. Even if the people did not build another tower, they could choose another equally presumptuous project. The solution must go deeper than that. It is not the tower that must be done away with, but what makes possible the building of that tower—an international language that provides communication among linguistic groups. If this ability to communicate is removed, it is unlikely that the individuals will continue with their work.

Talking Points
Building Kingdoms ON Innocent Blood; Kingdoms in the East; Innovation vs. Devastation; Celestial Tower; God Looks Down; The Power and Scare of Unity; God's Judgment & Grace; Where to Next?

References
The Book of Genesis, Chapters 1–17 - Victor P. Hamilton
Genesis 1-11 - Samuel Bray & John Hobbins
The Pentateuch as Narrative - John Sailhamer
The Bible Project (Genesis 1-11)
Adam as Israel - Seth Postell