whoever wrote this wanted to make clear that Judaism does not condone human sacrifice, in contrast to other contemporary religions.

I suspect that the addition of the lamb(goat?) Was a latter addition to distance Judaism from child sacrifice but that Judaism did evolve out of a religious tradition that practiced child sacrifice (and idolatry). But I’m also aware of how antisemites would love to slander modern Judaism with accusations in a similar vein, so it’s a kinda difficult line to walk.