Fishy,

It conflicts with religon because the tissue used comes from a by product of abortion. If stem cells can be harvested in other ways religous people do not have an issue with it. If we did not have abortion there would be little to no tissue. A catch 22. The issue is compounded by the fact that a large portion of these religous people participate in birth control that really aborts the embryo in it's early stages. Most of them do not know this.