Rashi #1: To teach us that, just as in the last plague prior to the Exodus, Hashem discerned between a B'chor and a non-B'chor ¹ , so too, will He pick out the person who lends his money to a Yisrael and claims that it belongs to a Nochri - and punish him.

Rashi #2: To remind us that Hashem took us out of Egypt on condition that we observe His Mitzvos, even if they are sometimes difficult to keep. ²

Rashi #1: Because Hashem gave it to us as a reward for keeping the Mitzvos.

Rashi #2: Refer to 25:38:3:1.

Kesuvos, 110b: The Torah inserts "la'Seis La'chem es Eretz Cana'an Lih'yos la'chem l'Elokim" to teach us that it is preferable to live in Eretz Yisrael, even in a town with a majority of Nochrim, than in Chutz la'Aretz, in a town with a majority of Yisrael.

Rashi: With reference to the previous phrase, it teaches us that Hashem is the G-d of whoever lives in Eretz Yisrael, and that leaving Eretz Yisrael is akin to worshipping Avodah-Zarah. ¹

Seforno: This is the main objective towards which one should strive, and it is best achieved by helping one another to ensure that communal life functions smoothly.

Kesuvos 110b: To teach us that Hashem is our G-d (and not an angel) only in Eretz Yisrael, and that it is therefore preferable to live in Eretz Yisrael - even in a town whose inhabitants are manly Nochrim, than in Chutz la'Aretz in a town whose inhabitants are mainly Jews. ²

Rosh (in Bamidbar 15:2): When the Cana'anim ¹ heard that Yisrael were coming, they cleared out of the land, Hashem declared 'You cleared out of the land ² - it will therefore be called on your name, and I will give you a land almost as good as yours -. Afrika.