I'm not well read in the Bible, but as I understand it from Google,
Involves a lot of man going astray from God in their actions,
Though, really that happens frequent in the Bible I would think,
Well, more frequent in some places, I suppose.
Or significant, in different ways.
"The book of Judges was written to show the consequences of religious unfaithfulness and to point the way to a king who, if righteous, would lead the people to God. In the book of Joshua, the people of Israel seemed to want to follow the Lord and obey his commands. The book of Judges reveals, however, that the people had been rebelling even in Joshua’s time. This disobedience continued and grew more serious throughout the period of the judges. As summarized in Judges 2:16–23, time and again Israel turned its back on God and embraced the gods and ways of the Canaanites. Israel’s history unfolds in a repetitive way, with each cycle taking Israel further away from God. By the end of the book, Israel had violated its covenant with God in almost every way imaginable."
. . .
I'm not arguing myself that Jephthah 'didn't sacrifice his daughter,
Though I do think there might be fair reason that some people take the view that he did not.
"The second clue can be found in the vow Jephthah made. In Hebrew, the letter Vav is used as a conjunction joining two parts of speech. In English, we have many different words that function as conjunctions. Not so in Hebrew. The one letter Vav represents multiple different conjunctions. It can mean “and,” “together with,” “but,” “so,” “then,” and “or.” Many scholars have translated this Vav conjunction as “or.”
If that’s the case, then Jephthah’s vow says, “Whatever comes out of the doors of my house…it shall be the LORD’s, or I will offer it up as a burnt offering” (Judg. 11:31). This vow could be interpreted to mean that if the first thing to come out of the house was appropriate to offer as a burnt offering, then Jephthah would offer it as a burnt sacrifice. However, if the first thing to come out of the house wasn’t appropriate to offer as a burnt sacrifice, “it shall be the Lord’s,” meaning it would be dedicated to the Lord." . . .
Certainly though,
Taking the view Jephthah 'did sacrifice his daughter, further pushes the idea of child sacrifice being common in that time and area, and 'influence on the Israelites.
A theme I remember in the Old Testament, was frequent Israel allowing itself to be influenced by other cultures and beliefs, in a way the Bible argues are negative and harmful.
A theory I like, is that Abraham and Isaac, is about making a point, that the Israelites are 'not to do such,
That the sacrifice of children is not what God wants.
Though I've heard other people make comparisons between the Binding of Isaac and Jesus.