Creation Science comes to mind first. When political and educational policies have to match religious beliefs, that isn't good for a free society. It certainly doesn't help America regain its image as a well of prosperity, creativity, and innovation.
Fistful, I pick Christianity because it is the dominant religion in this country. I have no love for Islamic mullahs or Jewish black hats (actually, I have less love for them than any). Religious belief trumpeted as public policy is bad for democracy.
I lol'ed.
1. Creation Science seeks to be presented as an alternative, not to supersede atheistic humanism. I find the idea that having your beliefs presented as one of a number of (equally untestable, unprovable) options is theocratic oppression hilarious.
2. Atheistic humanism is every bit as much a religious as Judaism, Christianity etc. So when the state sez "You shall teach this and only this" they are in fact enforcing their chosen religion.
3. Per the bolded statement, you should be in favor of presenting alternatives to the state religion of secular humanism. I guess the fed.gov forcing religious beliefs on people is only bad when it's not your beliefs, eh?
4. Research indicates that while many people profess a cultural identification of Christianity, the majority hold actual worldviews most consistent with secular humanism. Guess the fed.gov indoctrinating kids in the state religion works out, eh?
5. Finally, the entire thing is a huge strawman/red herring as introducing Creationism into schools is not a plank of the Republican party.