I didn't even realize people argued this based on religion. Someone wanting to end their own life, sure. If any way another person especially a physician is involved then I'm against it. Tenndoc you argued a physician's job is to do no harm, but then the way you describe it is a bit contradictory. Killing (to me) no matter how/why you do it, is doing harm. I personally think the physician's job is to try their best to cure. Yes, even if there's no cure. A fight is only lost when you stop fighting 🙂 Or something of that cheesy sort...
Of course, it's a bit difficult to argue this when I'm not the one in a terminally ill situation. I guess I now see how religion is brought into this, with the idea of not knowing what that person's future was supposed to hold even in those agonizing months of pain. The whole "God has a bigger picture than we can imagine" thought.
But to continue this without the religious view, I think the only time there should be a doctor and a dead patient is if the doctor tried everything they could and failed (or if they're a pathologist 😛), not by giving up because the patient gave up. Some patients don't like being sick at all--where do you draw the line? You'd say "if they're terminally ill" but how often have patients been told they have 1 year to live and they lived 12. And possibly did a lot of great things in those 12 years.
Lonnnnnng story short, you're ending someone else's life--no. Person ending they're own life--that's their perogative.