So we agree that the process is finite. Excellent. That leaves open the possiblity that it may not have happened (ie: it's not a magic do-all power).
Of course it may not have happened, but consider how many variations of DNA have come about with only for different compounds. We share over 99% of our genetic code with other humans, and look what that remaining percentage has generated alone. Chimpanzees differ by only about 3% from our entire species. Therefore, the fact that there are only so many combinations is nearly irrelevant to the likelihood of evolution happening of its own accord.
Who said ID was going to be taught as a science?
The fact that its to be taught alongside science that is the issue. Many of the ID supporters I know wish the two methods to be taught as equal possibilities, therefore suggesting that they believe it to be science. At least, that is the case with the supporters I know personally.
ID objects to some parts of evolution (certainly not all of it). Why not bring it up as a discussion point? The bill allows that to happen without fear or favor. I still don't see how science education is threatened.
ID objects to the idea that evolution was spontaneous and could occur without a "designer's" influence. This designer, in order to avoid the issue of who created the aliens that created us, would have to be supernatural in origin. Science and the supernatural are not subjects that can be mixed, much as the entirety of the ID/evolution/creationism debate proves every time somebody brings it up. When the two are mixed, both will obviously try to come out on top. So far, neither side has pushed hard enough to do so in a decisive matter, but when it does chances are that the opposing side will be eliminated from society, or at the very least brought to an almost cult-like status as far as its following is concerned. Obviously, in a nation that is over 54% certain that Christianity is true (and yes, I realize they are not officially the ones pushing for ID), such support that a god-like deity is responsible for life as we know it would be devastating to the pursuit of knowledge.