In the book of Judges Jephthah, judge of Israel and leader of the Israelite army, tells the king of the Ammonites (chapter 11 verse 24):
"Do you not hold what Chemosh your god (elohim) gives you to possess? So we will hold on to everything that HaShem our God (Elohim) has given us to possess".
These words have left me very perplexed, because it seems that Jephthah believes in the real existence of Chemosh as a deity, and that he has the power to assign their land to the Ammonites, similarly to what HaShem did with Israel.
How does the Jewish tradition interpret this passage?