1)
Why does it say "vi'Yhudah" with the prefix Vov?
1.
Radak: Egypt and Edom will be desolate and never settled, but Yehudah will be settled forever.
2)
What do we learn from "vi'Yhudah l'Olam Teshev"?
1.
Malbim: Initially, Efrayim separated from Yehudah. Then they will be joined, and never exiled.
3)
What does the verse teach about Yerushalayim?
1.
Malbim: It will never be destroyed again.