There are two ways of reading those verses. If we consider the words, How should one Israelite chase a thousand? we must then view the salvation of Israel, as effected by GOD. But if we consider the words, rather as corresponding to a deserted state by reason of Israel's sin, it will then appear; that the timidity of Israel ariseth, in that the LORD hath given them into the hands of their enemies. See Isaiah 30:17. The contrast drawn between the confidence of GOD'S enemies, and the GOD of his people's confidence in those verses is beautiful. But Reader, remark with me, the graciousness of GOD, and the LORD'S pity over his people, when they are brought down to a low estate. See Leviticus 26:40-43.
Deuteronomy 32:30-38
30 How should one chase a thousand, and two put ten thousand to flight, except their Rock had sold them, and the LORD had shut them up?
31 For their rock is not as our Rock, even our enemies themselves being judges.
32 For their vine is of the vineg of Sodom, and of the fields of Gomorrah: their grapes are grapes of gall, their clusters are bitter:
33 Their wine is the poison of dragons, and the cruel venom of asps.
34 Is not this laid up in store with me, and sealed up among my treasures?
35 To me belongeth vengeance, and recompence; their foot shall slide in due time: for the day of their calamity is at hand, and the things that shall come upon them make haste.
36 For the LORD shall judge his people, and repent himself for his servants, when he seeth that their powerh is gone, and there is none shut up, or left.
37 And he shall say, Where are their gods, their rock in whom they trusted,
38 Which did eat the fat of their sacrifices, and drank the wine of their drink offerings? let them rise up and help you, and be your protection.