Euthanasia or suicide and removing the feeding tube from someone literally incapable of feeding themselves is not the same thing. I was pretty shocked to hear that the Dutch allowed a 29 year old woman to be euthanized due to suffering from Borderline Personality Disorder. Not even going into the fact that this disorder is supposed to improve in the 30's and 40's, the whole idea of killing someone just because their mind is not working "correctly" is absurd. I'm sure there are some very severe cases of schizophrenia where a person is literally in a terrible delirium all the time, cosmic paranoia, and is really genuinely suffering a great deal. Or even catatonic, I can't imagine what people in that depth of suffering are experiencing. Or extreme autistics who can't look after themselves and have to be restrained to stop aggressivity. In these cases, I don't know, perhaps a case could be made if the person were capable of any kind of consent, but by the very nature of their condition they aren't.
BPD? As a reason to kill a 29 year old woman? Seems extreme to me. Suicide is a personal choice, one that carries some karma and not one that should be encouraged, especially given the suffering it causes for family etc. At the same time, I can see that there could be an argument that it is a personal choice. It's not really anyone's place to impose their religion on others, including their beliefs about suicide. If soldier's can go and risk their lives for often completely absurd and even wicked causes, why should a person not be permitted to cause their own death outside of that situation? Seems somehow hypocritical to me, though at the same I would say that risking one's life for a stupid cause is never something that should be encouraged, and in an ideal world would be prohibited.
Yet removing a feeding tube from someone? The person is no longer alive in any meaningful sense, their life is being sustained by totally artificial means. With that amount of brain damage they're effectively gone, it's only out of attachment that people can't simply let them go.
I also object to how euthanasia and abortion are conflated by pro-life groups as if they are the same thing. Even when just a clump of cells, a fetus is a potentially viable existence. If the child is going to have some utterly crippling disability which will make its life essentially not worth living, ok perhaps it can be argued that this is no different from a person in a permanent vegetative state. But removing the feeding tube from someone being sustained artificially is nothing like destroying what can potentially become a complete and self-sustaining human life.
EDIT: I meant to say that while suicide is a personal choice, demanding that someone else facilitate it i.e. euthanasia, is not the same thing.