Of course they do. Unless a person is clearly insane and unable to comprehend what they are doing. It is inhumane and cruel to prevent someone suffering like that from dying - the very thought of it almost makes me cry, and i'm not a very empathic person.

And yes, mental illnesses are a particularly terrible case. Being insane does not mean not having a debilitating, painful and incurable - whether or not outright terminal - physical illness. And perhaps, a really bad and certainly incurable mental condition itself is enough. Just take advanced Alzheimer's. What's the point of forcing people to suffer like that? Themselves and their caregivers, too. But i understand that one is unapproachable because of immediate Aktion T4 = Nazi = BAD association and will probably remain so for a very long time.

But for fuck's sake, at least get off the butt of mentally fit people who don't want to suffer!