Kenan Malik in Pandaemonium:
A man is standing on the parapet of a bridge. He is about to jump. What should you do? Most people would agree that the moral act would be to talk to him to try to persuade him not to. Most people would also agree that giving him a push because “that’s what he wanted” would be committing murder.
Your grandmother is dying. She is in great pain, has only a few days to live and wants you to end her life now. It’s unlikely that most people could bring themselves to do that. But most would probably understand if you did accede to her wishes, however tormented you felt. And even more were a doctor to give her sufficient painkillers to allow her to die in peace.
The debate about assisted dying is one in which there are no simple answers; a debate in which we need to acknowledge that truth and moral decency lie on both sides and in which context is particularly important in judging what is right and wrong.
More here.