1)
Why does it say "va'Yis'halchu mi'Goy El Goy"?
1.
Rashi: Each of the Avos was exiled from being a stranger in one place to being a stranger elsewhere.
2.
Radak (12-13): Hashem put Emunah in their hearts; even though they needed to go from Eretz Kena'an to Egypt and Eretz Pelishtim, they did not resent Hashem's ways.
2)
Why does it add "mi'Mamlachah El Am Acher"?
1.
Radak: The matter is repeated in different words.
2.
Malbim: Goyim are collections without a king. Amim are collections with a king. When they went from Goy to Goy, He did not let a man oppress them. When they went from Mamlachah to another Am, He rebuked kings about [mistreatment of] them (verse 14).
