"Many conservative Christians also oppose stem cell research fearing this murders potential babies. With this logic, every time you scratch your nose, you have potentially killed human beings since all cells have potential for human life."
The above statement reveals that you either know nothing about stem cell research or else you are being intellectually dishonest. Stem cell research does not involve "potential" babies, it involves creating human embryos, which are actual babies, for the purpose of harvesting their stem cells for research purposes. Human embryos are human beings. If their development is uninterupted or unimpeded they mature into adult human beings someday. Therefore, conservatives object to stem-cell research because 1.) It creates a human life, which, if allowed to develop to full maturity will indeed become a fully functioning adult human being, and then kills that human life, and 2.) because it treats that human life as a means to an end rather than as an end in and of itself.