Personally I've always thought too much of a deal was made of the school/ religion thing. Why a school sports team cannot say a prayer before going on the field doesn't make a lot of sense to me. Why a school has to have a winter program with no songs in it that would in any way say something about Christmas doesn't make sense to me. I will add that I live in the midwest and I'm in a town of just over 1000 people, so we're not really a religiously diverse group. Other parts of the country are different. And this comes from someone that was last in a church for someone's wedding or funeral, just not sure which one was last.
Because we live in country where public institutions are not supposed to promote one religion over another. All are supposed to be welcomed and comfortable participating in any publicly-funded institution. You can't understand this until you are part of a religious minority group.
I always have to ask those that want creationism taught in public school one thing. Why would you want some teacher that probably doesn't want to teach this, to teach your child about creationism. How much justice do you really think they will do. Since most churches also have Sunday schools for the kids, why not let them learn what you want them to learn about religion there.
If you believed in evolution and nothing else, would you want a preacher teaching your kid about evolution.
Scientists should teach evolution and other scientific theories. Theologans should preach the many different stories about how they believe the world was created. BTW, there are hundreds if not thousands of different Creation stories (check out this list
as a start) and only promoting one of them, from a rather narrow Christian view, in public schools is alienating and wrong. I would love to see all public school students take comparative religion classes, where they compare and contrast many different religions' and cultures' beliefs. That's an entirely appropriate forum in which to explain what Christians believe, as well as many other religions around the world.