Legal Double-Standards in our Schools

I heard about this story a week ago, and was outraged. It wasn't hard to Google, either. It is about how the Ninth-U.S. Circuit Court of Appeals upheld that making 7th-graders in California memorize verses in the Koran, pray Muslim prayers, and act out other Muslim exercises is alright. And yet, any hint of Christianity has now been denied access to our schools! How can such a double standard be allowed?

I think it is alright to allow students to learn about the major religions in the world, so they can better appreciate other people's belief systems and understand world politics. But to deny access to one religion, which this country was founded on, while permitting another religion seems backwards.

I seem to remember stories of harmless Christian activities, such as prayer before sports, or a prayer at graduation (See recent story), not being allowed because ONE parent objected. But in this instance, the Muslin teachings continued, but parents could keep their child from attending.

Am I missing something?