This is not a debate, it's a pointless thread.
The original question is badly worded. I believe in abortion and the death penalty, doesn't mean I think they're right or justified, but I'm fairly sure they exist. Think before you write, otherwise you end up sounding stupid. On top of this, the vote doesn't have an option to vote "neither", as in being against both abortion and the death penalty.
As for the premise. The original poster here has little to offer on the subjects of 'The Death Penalty' and 'Abortion' as evidence by the length of the post and the extremely basic description, "they both involve killing humans", oh really do they?
The Death Penalty - The use of death as a punishment for those who have committed the most vile of violent crime, a way of removing the criminal from the public consciousness in a permanent, swift, and efficient manner at the cost of sanctioning his/her state-sponsored murder.
Arguments For - It provides a deterrent for potential criminals. It removes dangerous people from society swiftly and efficiently. It costs relatively little tax-wise and means the victims are not forced to pay to keep this person in prison, prison space is already crowded anyway.
Arguments Against - It actually doesn't provide a deterrent (US states with death penalty have higher murder rates), actually lack of education and wealth disparity seems to be the biggest factors in causing violent crime. No-one is 100% accurate, which means it's not just possible, but a fact that innocent people are put to death for crimes they didn't commit because the justice system can make mistakes. It removes the chances for studying the minds of psychotic and violent individuals so that we can better understand their motives and reasons and prevent them in others, all for the sake of vengeance on the part of the victims families.
...now those are points of debate. I personally would not support the Death Penalty, but should someone want to make an argument for it by all means.
Abortion - The termination of an unwanted pregnancy using a medical procedure that safely kills and removes the foetus before it reaches a certain maturity.
Arguments For - Abortion is required as people can get pregnant without wanting to and it's their right to do what they wish with their body, including having a child when they want. The "baby" isn't a person yet, it doesn't think or feel, and is therefore nothing more than a collection of living cells no different than removing a parasite or tumour. Even if it's not legal women will still get abortions, so isn't it better that they get them from a doctor than a back alley clinic. There are points where abortion is necessary as well, such as with victims of rape, where it would be cruel for both the mother and child to put them though the emotional trauma, or where carrying the baby to term would kill the mother at which point the mothers life should come first.
Arguments Against - The foetus is a living human being, just because it's not thinking or feeling yet doesn't change that. That person is an individual who would be distinct from their mother if brought to term, and terminating this pregnancy will kill it permanently. A future pregnancy would produce a different child, not reproduce this one. It's fair to call this murder and to claim the mother doesn't have the right to end this life any more than they do a child of 1 week old as they also do not think or feel in a way we would consider human as their brains are still developing. Largely this is an argument of the rights of the mother vs. the rights of the child, and the mother doesn't have the right to kill the child even in it's most early developmental stages, once conception takes place the mother is responsible for caring for this child as they would any baby.
Please note - I am ignoring religious arguments. I don't care what someone's imaginary friend has to say on the matter.
...this is a much more involved debate. With the Death Penalty debate I feel there's a clear right answer, with this one I'm not sure. I am personally against Abortion. I do not support it and would not want people to use it. I feel people mature enough to have sex should be responsible enough to use contraception and smart enough to take the morning after pill if the contraception fails. That said, I am aware of rape cases and medical requirements, as such I feel abortion should be legal for extreme cases, but I do not believe the claims that a woman has the "right to do what she wants with her body" because it's not her body, it's the foetuses body, it's just inside her. The foetus may not be a person yet, but this feels like a technicality. They know this foetus will grow into a thinking, feeling, individual and claiming it's not yet, strikes me as word games and not a convincing argument. For this reason I'm tentatively against abortion, but would keep it legal for cases or rape or medical emergency.
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As you can all see, Abortion and The Death Penalty, have FU.CK ALL to do with each other and are not worth comparing or contrasting. No-one is going to argue that the prisoner doesn't count as a human, and no-one is going to argue that the foetus deserves to die for justice. This paring is hugely ignorant to both subjects.