1)
Who was the Mal'ach who helped defeat the six above-mentioned nations?
1.
Seforno: He was the Sar Tz'va Hashem who appeared to Yehoshua 1 before the conquest began.
1
Refer to Yehoshua, 5:13-14.
2)
Why does the Torah omit the Girgashi from list of the seven nations that comprise Eretz Cana'an?