Even the smallest of governments have a legitimate role to play in defending human rights. "Sin" doesn't have anything to do with it. The Constitution clearly says that "all persons" are entitled to the "equal protections of our laws." Our supreme court acknowledged that fact (see my sig.) So, it all comes back to whether or not a person in the first days of their life, growth and development is a human being / person or not. The science (not religion) tells me that they are.