1)
What will be the similarity of Egypt to Yerushalayim?
1.
Malbim: Just like Yerushalayim was punished via Hashgachah, also when you come to Egypt.
2)
What are "l'Alah ul'Shamah veli'Klalah"?
1.
Radak: Alah is a curse. The matter is repeated in different words.
2.
Targum Yonasan: Alah is a Shevu'ah. Radak - this is like "v'Hinachtem Shimchem li'Shvu'ah li'Vchirai" (Yeshayah 65:15. People will use your name for curses and Shevu'ah - if will not occur to you like occurred to Ploni).