There's no national curriculum in the US, but religion most certainly is "banished" from state schools. Not even excepting religious classes - there aren't any

There's no national curriculum in the US, but religion most certainly is "banished" from state schools. Not even excepting religious classes - there aren't any such classes in state-operated schools, at least not any that I've ever heard of. Treating school systems as the primary mechanism for transmitting cultural memes, and attributing social attitudes to its functions, seems a very bizarre position. In fact, if anything, the exact reverse may be the case: by not permitting religion to have any state-supported expression, it ensures that religion is sustained and advanced by civil society itself, which yields a much more vigorous and energetic religious sphere in American culture than you'd see in countries where religion is mediated and subdued by politics.