Actually, much as it pains me to say it, those verses are referring to human sacrifice. The idioms used are actually pretty specific to those acts.
But their inclusion, and their full context, makes it clear that the acts that they describe were extraordinary, and not the usual state of affairs.
Generally speaking, during the struggles between YHVH monotheism and monolatrous inclusion of other deities in worship during Biblical times, the weakness of the ancient Israelites was either for associating YHVH with the Baal deities of the Canaanites, or for including fertility goddesses like Asherah and Ashtoret in their worship-- which is understandable, everyone likes a good fertility ritual. But much more seldom were outbreaks of the worship of Chemosh and Molech, gods notorious for "demanding" human sacrifices-- especially Molech, a truly abhorrent abomination whose rites were heavy on child sacrifice. These gods are some of the few singled out by name in the Torah for prohibtion of their worship specifically, not just by general proscription of idolatry.
The texts in Judges and Kings that describe outbreaks of such worship are clear that they were shocking and not at all the usual course of events, even during epochs of idolatry amongst the Israelites.
To say that human sacrifice was ever common amongst the ancient Israelites, or even most of the supposed proto-Israelite groups is more than just a stretch. It is simply untenable.