I can tell you that's completely fallacious. Unless it was a private school. It's illegal to teach any one religion in a U.S. public school. The exception would be classes on comparative religion (which I have never heard of being taught at the grade school level), in which case multiple religions are compared and contrasted.
Egypt says verdict in Al-Jazeera case expected Saturday (AP)
from the article: Jews won’t mind Romney’s Mormonism – but Christians might