Comparative religion is a great idea in school. But it is exactly the religious people that block that, not the atheists. No fundamentalist can tolerate the idea that their children might be taught that most religions are very similar at their core or that the offical histories contained in all religious tracts are equally bogus.
Too much touchy-feely and esteem based teaching comes from the left, but the right has done just as much damage to schools as the left. A lot of history and science is intentionally blotched out to keep it from offending the sensibilities of the religious.
Jay