I believe that (gasp!) students should study science in a science class. So far, the only real scientific theory dealing with the explanation of the diversity of life is evolution, so this is what should be discussed in science class. If the question shifts to the origin of life, I have no real problem with mentioning that some people believe that God created life, but that this isn't a scientific idea. That is because as of now there is NO scientific theory on the origin of life. (evolution doesn't cover this.) I also have no problem with teaching the ideas of creationism in another class. I firmly believe that a class dealing with the ideas of the major religions (with emphasis on Christianity, Judaism, and Islam, since these seem to be the most influential in modern society) would be of extremely high value. I do not object, in short, to teaching creationism. I do object to putting it on an equal footing with evolution, however, since creationism is not a scientific theory and evolution is.
What are you afraid of? I say: (1) let manure be served together with food in resturaunts; (2) let poison be administered together with medicine by doctors; (3) let slavery be enjoyed together with freedom; (4) I can't go on with such nonsensical analogies.