Quoting nutmeg.:" Unless he is in a public or government funded preschool, they have the legal right to teach the kids ... [snip!] ... to the director, but if it is causing an issue you're best resolve would be to pull your child from that particular school."
Of course they'd have a legal right under those circumstances, but it is completely reasonable for her to ask them to stop, and if they don't, then to move her kid. I think that's the point of this.
Also, I really feel that unless they STATE they are a Christian-based daycare, then they need to not be teaching these things to the kids.