Neither was I but then I wouldn't have had a problem with just learning about other religions and cultures. I'd be against any kid having to actually write anything that was effectively a statement of belief but that's not exactly the same thing is it?
I learned about other cultures just fine without writing their religious creeds.
So you would be fine with them writing this: "Jesus Christ is God and there is no other way"? The shahada says there is no god but allah and muhammed is his prophet - which is the islamic conversion creed.
Tell me how you see no difference, and how you cant learn about other cultures without writing a conversion creed