This is just bad logic. "The building has to have a builder" argument is sophomoric and entirely unscientific.
This issue has nothing to do with the Constitution and our "rights" to teach without discrimination. You can believe what you want, but there is no evidence whatsoever that there is a "designer" inherent in nature, and such a baseless claim has no place in a science class, period.
Furthermore, if the evidence for design is so "abundant and convincing," why didn't you link it to this post? There's not even a paraphrasing of this evidence. If ID and its clones are so scientific, there must be concrete evidence published somewhere.
I think the proponents of ID & creationism are confused. There is no problem with holding the belief that the universe and everything in it was designed, just keep it to a humanities course.
Evolution is a scientific theory, not a personal philosophy. When science teachers introduce evolution, they are not promoting naturalism, they are teaching the pillar upon which all of biology is firmly planted.
Dawn: Here is your proof of evolution: antibiotic resistance. Please click on the link; it will explain a lot.
The organism that is the most fit, the most well-adapted to its environment, will live long enough to mate and pass on its genes. That is the essence of evolution.
A textbook example:
During the industrial age in the UK, the factories expelled enough soot to turn the trunks of trees black. There were black & white speckled moths living in this forest. The moths that were lighter colored stood out more against the now black trees, and birds and other predators ate them. The moths that were darker (better adapted to the changed environment) were well hidden from predators, not eaten, and lived long enough to mate. They passed on their genes to the next generation, and those subsequent moths ended up being darker.
You see, it's not strictly about human beings evolving from apes (although that is the problem that most people have with the theory) and it's not necessarily about the origin of life.
Dawn, there is plenty of evidence for evolution if you look in the right place: science textbooks, journals, magazines and websites devoted to research, not to forging a new foundation for atheism.