Because the most important aspect of science education is teaching the scientific method, the formal process by which scientists evaluate information and determine facts. ID is not compatible with the scientific method, and teaching it in science class will inevitably confuse students and hurt the teaching of science.
I don’t buy that for a second. You’re telling me that you can’t teach “scientific method”, and also delve into some questions that are more theoretical and transcend scientific method?
I don’t see this as confusing at all.
Could you give me examples of how such “confusion” might play out?