This is the lowest common denominator, where undue weight is given to something because people FEEL strongly about it. Feelings and belief have no place in a science class where people are being taught to be critical. There is no critical thought allowed in Creationism, because all questions go back to "Because it is God's will". That won't teach students to be critical, it's a thinly veiled attempt to injection theology into a science course.
If a scientist asked to have a segment in Sunday school classes where he would offer criticism of The Flood, discuss how Carbon Dating puts the 6,000 year Earth to task, and wishes to show how the fossil record shows how animals changed over millions of years, would you be kosher with that?
I hope my kids will learn about the Christian creation story in school, right alongside the Tree of Life, norse tradition, the story of Buddha, etc. The Christian creation story belongs in a different context, not in a science class.