Judges 113 “Now since the Lord, the God of Israel, has driven the Amorites out before his people Israel, what right have you to take it over? 24 Will you not take what your god Chemosh gives you? Likewise, whatever the Lord our God has given us, we will possess. 25 Are you any better than Balak son of Zippor, king of Moab? Did he ever quarrel with Israel or fight with them? 26 For three hundred years Israel occupied Heshbon, Aroer, the surrounding settlements and all the towns along the Arnon. Why didn’t you retake them during that time? 27 I have not wronged you, but you are doing me wrong by waging war against me. Let the Lord, the Judge, decide the dispute this day between the Israelites and the Ammonites.�
Let's examine the passage.
Our leaders know that wars, not gods (notice Chemosh, another god, frequent identified AS Yahweh, paradoxically) determine land grabs.
This was more plain then, than it is today.
Jephthah well knew this: Does this naive passage demonstrate very plainly that the God of the Israelites is a contrivance, just as Zeus was a contrivance of Rome, to persuade the Jewish peoples to obey and act?
The OP is meant to focus on the artificial character of the passage.
In this light, doesn't the passage seem contrived, and obviously so? It would never work today when we can see men order wars and their results.