What are the ramifications of "Ge'ulah Tih'yeh lo"?
On what grounds can one expect the Nochri to comply
Rashi: The Pasuk is speaking about a Nochri who is under our jurisdiction.
Why is the current Halachah not obvious?
Seforno (citing Kidushin, 20b): We might otherwise have thought that, since the Eved went and became a priest to Avodah-Zarah, we are permitted to 'push a stone after the fallen', and leave him where he is.