There are many sensible arguments both for and against. BBC has a very short review of some main arguments for and against:

* For: https://www.bbc.co.uk/ethics/euthanasia/infavour/infavour_1....

* Against: https://www.bbc.co.uk/ethics/euthanasia/against/against_1.sh...

Most of these aren't sensible.

They really aren’t, I can’t believe someone here would link that.

While I disagree with some of them and find some more important than others, I think that the lists cover most of the arguments and positions mentioned by people here on HN

I don’t think I’ve ever seen anyone use religious arguments on here and I’ve been here since the beginning. Most of those arguments are religious. I do not consider “Euthanasia is against the word and will of God” a sensible argument, though I realize, of course, that like half of humanity would disagree with me. But nobody who has any formal training and philosophy or debate would.

If the opposite of a statement is just as valid as a statement, it is not an argument. For instance, I could say it is God’s will that we do euthanize people so that they don’t suffer, and God gave us the intelligence to find ways to die that are significantly less painful. My argument has no less logic than theirs.

If “nuh uh” is a substantial rebuttal, your argument isn’t sensible.

While it's true that the first section in the arguments against euthanasia is "Against the will of God", the others aren't. Arguments such as

    * There's no way of properly regulating euthanasia
    * Euthanasia exposes vulnerable people to pressure to end their lives
    * Voluntary euthanasia is the start of a slippery slope that leads to involuntary euthanasia and the killing of people who are thought undesirable
    * Proper palliative care makes euthanasia unnecessary

are not primarily religious and you will find them repeated several times here in various wordings. The argument "Euthanasia weakens society's respect for the sanctity of life" may be based on religious belief but I don't think it's a uniquely religious standpoint that life has some form of sanctity

Those arguments aren’t all religious but they are mostly very weak. It is properly regulated in places. Nobody is pressured into it. There’s no evidence or logic to support the idea that euthanasia is some slippery slope to concentration camps, in fact it’s been legal in places for a time and nothing of the sort has happened.

If I said “euthanasia leads to long lines at the grocery store“ it would be a no weaker of an argument than most of those.

Arguments like these may not all be directly religious, but they come from the same place.

I realize it’s just my opinion, but I’ve still never heard one intelligent argument against it.