The monoploistic educational bureaurcracy has difficulty when the public attempts to influence education. This explains the passionate opposition to school vouchers as well as the rise of home schooling. ID is not nearly the threat to science as is the dogma emminating from the Ivory Tower which will use the courts and the ACLU to impose their will on a recalcitrant public. In other words; how dare the peasants lecture their betters.
And finally, this ultimately goes back to the establishment clause in the US Constitution and how it should be interpretted vis-a-vis schools and religion. Since the 1960's the courts have upheld a God-free zone in the American classrooms, quite often to absurd lengths. ID is the push back.