Why was the angel initially in Gilgal?
Rashi citing Seder Olam: The 'angel' was Pinchas.
Radak citing Targum Yonasan: The 'angel' was a Navi. There, Hashem told him to say this to Yisrael.
What is "ha'Bochim"?
Rashi: It is a place. Radak - it is called so because they cried there (verses 4,5).
To whom did he speak?
Radak: He spoke to all of Yisrael. The Navi gathered them, or they were already gathered.
Why did he mention Yetzi'as Mitzrayim?
Rashi: Hashem took us from Egypt on condition that we dispossess His enemies [from Eretz Kena'an].
Malbim: I took you from the lowest level - slavery in Egypt, to the highest - I brought you to Eretz Kena'an! I said that you should feel obligated to serve Me amidst appreciate of this, and I made a permanent Bris with you [on condition?]
Why did he say "E'eleh"?
Radak: We often find the past in a future conjugation.
