So since other things have been banned in the name of "safety", we let one religion bypass all that.
If it were a different religion, how many here would be squalling "separation of church and state"?
Which takes precedence then? That's what it boils down to.
If we're going to clamor about for safety in our schools at all costs, then we gotta get consistent. If a school had (as this one seems to have had) a pre-existing policy regarding jewely, then the cross necklace is out...as is this other stuff. But if one is allowed, then the door is open for all to walk through. At least that's how it's spun when the shoe is on other feet, right?
Then there's the whole kettle of fish about cults. They're a religion, right? Well, say a kid comes to school with child porn in his backpack, then produces literature from the Almighty Church of the Glorious Reformation which requires all adherents to possess visual reproductions of the naked child Tabitha, who is their diety, as this celebrates the inner beauty and innocence the adherents strive for. What then?
The above example is not all that ludicrous...how many potheads have tried to get out of legaltrouble by using the same argument when they get busted for having a dimebag? Same principle.