What is the significance of "Horashta Es Yoshevei ha'Aretz ha'Zos mi'Lifnei Amecha Yisrael"?
Malbim: You would not abandon us due to change of desire. The Goyim were living here - if You wanted them to live here, You would not have dispossessed them!
What is the significance that He gave it to Zera Avraham Ohavcha?
'Rashi': Therefore, You should sustain it in their hands, and expel these nations. Even a king, or anyone who gave a gift to his beloved, and another comes to steal it from him, the giver exerts himself to ensure that the recipient keeps it - all the more so You should!
Malbim: Do not say that before, Yisrael merited the land, but now their deeds changed, and Your desire changed. You promised this to Avraham - it did not depend on his seed's deeds!
Why does it add "l'Olam"?
'Rashi': You did not give a temporary gift - it was forever!
Malbim: Your desire will never change (refer to 20:7:2:2).
