Given the way society is changing/developing, with a greater number of people, year on year, associating themselves with no religious group, it does seem a little uneven to educate children in the various different religions but chose to omit the perfectly acceptable viewpoint that none of the religions are actually right and there isn't a God. Obviously this viewpoint won't be taught in any particular depth as, by it's very nature, there isn't a great deal of depth to it. There are no parables, books of the bible, miracles or sermons to educate about, and as such the time set aside to it will likely be less. To ignore it totally however seems like an (albeit watered down) version of the deep south of America, where they refuse to teach about evolution and instead teach about creationism and literal bible versions of how the Earth developed.