
Let's be honest, today's passage is one of the most emotionally disturbing in the entire Bible. How do we make sense of Jephthah's tragic vow? Here are two articles (the second one is a response to the first) which might help:
Here is the first article by Miles Van Pelt, who teaches at Reformed Theological Seminary in Jackson, Mississippi.
Here is the second article by Tamie Davis who writes from Tanzania. She gives a different perspective on the passage.