What about celtic (or other pre-christian) stuff?
2 in green = fairies?
3 = rivalry triangle...
5 = the pentagram used to be carved on window & doorposts, to ward off evil (Jewish/Christian superstition). Jews associated the pentagram to the pentateuch.
6 proud walkers = I heard of a place called like that in wales, from 6 standing stones there.
I heard there is an older version, which has much fewer Christian references. I've actually seen one, but I think it's an invention. Still our modern version could be a "clean" version of an older "heretic" song.
Charles