Let me put it another way. Let's say that 80% of a group believe the sky is blue, while 20% believe the sky is red. Let's say they live underground and can't prove either theory, but they both have persuasive arguments, faith, etc. What right do the 'red-skyers' have to teach ONLY the theory that the sky is red, even though they are in the vast minority? If they control the teaching environment, then they will achieve their goal of convincing ALL their pupils that the sky is red over a given period of time.
Consider then also that they have developed a spectrometer, and brought it to the surface. Then the wavelength of the incomming light turned out to be around 700 nanometers. Then your anology would be more correct.
As in your example there is not a single reason for them to believe that the sky is blue, but still they do...
The same with evolution. Regardless of your personal disdain of the 'creation' theory, teaching ONLY evolution, without discussing the obvious holes in the theory, will convince an entire generation of children that evolution occurred. They will be convinced without having all the facts at their disposal. Sound familiar? Can you say WT?
The have lessons in theology or something like that on schools? Is that not the time.
And why only the certian view. Should Americans not be forced to be educated in the koran, the teachings of bouddha etc?
By the way, why do the bibles in the states not come with the warning:
"This book is fictional contains voilence and sexual explicit scenes, and can be harmfull and dangerous to people who can not make the distingtion between fiction and fact"
If they do that, then maybe we can think about teaching ID on schools as an alternative.