Rattigan350 Everyone knows what the Abraham and Issac story is meant to teach, obedience and Jesus's future sacrifice. What is ridiculous is the whole premise of the request and why plant this crazy idea in the heads of ancient people to sacrifice your child to appease Jehovah. Especially when all the pagans around are all doing the exact same thing.
The text explicitly says that the vow was to offer her as a burnt offering and that Jephthah carried out his vow. Of course Jehovah would not want him to kill and sacrifice another human, but he didn't care either.
Jehovah wants men to marry only one woman as set forth with Adam and Eve. He doesn't even want you to look at a women with lust. So King David and Solomon couldn't possibly have had all those wives and concubines. Yup for sure!
Judges 11:40 does not say that maidens would visit her every year. It says that every year Israelite women would "commemorate" (tnh) her every year for four days, i.e. lament her death and recount her tale.