"Neither can pass laws which aid one religion, aid all religions, or prefer one religion over another." So would you be okay with all religions being examined in the context of, let's say, history? Religion, like it or not, is an intrinsic part of any society and therefore should be understood. When did we start banishing information that a few find uncomfortable from schools? Isn't the point of school to turn out informed students who are prepared to meet and understand the larger world? Again, religion is not some side issue of no import. It's everywhere and threads its way through society, culture, and history.