You have a point with regard to philosophies of law and inalienable rights.
But you don't have a point with regard to science.
The problem with the ID movement is that it seeks by the power of government to force science to expand into philosophy and religion. Issues with no evidence for science to consider.
I agree that philosophy and history of religion classes should be requirements in school. And that is where ID should be discussed. But NOT in science class, because it damages the scientific method that it is built upon.
OK.
Currently ID is not being taught anywhere in public schools. And you are right, perhaps it is a subject more appropriate for philosophy classes.
My biggest concern is from a law and inalienable rights point of view. If young kids are brainwashed by schools that exclude God into becoming secularist/atheist, they have no grasp of the concept of where our rights and freedoms come from.
Atheists/Secularists are creating a state-sponsored religion in violation of the First Amendment and it is on full display in our public schools (i.e. government is "god). Resistence to ID being taught anywhere in public school is mostly on the part of people like that.