(A note: I'm going to refer mostly to the US government in this because 1. The OP is from Arizona, and 2. I live in the US, so it makes sense that my arguments reflect the society I live in.)
Do you think Capital Punishment is cruel: Yes.
Do you think the government sets examples by using the death sentence: Yes.
Do you think Capital Punishment is over-used: Yes.
Do you think that we should abolish Capital Punishment: Yes.
Do you think Capital Punishment sets a bad example?: Yes.
A month or so back, I had a lengthy post that outlined my beliefs on this subject on a different forum. Unfortunately, it seems that the topic has been deleted, so it seems I get to rewrite my position instead of simply copying and pasting it here.
I personally detest the death penalty. I give credence to the brutalization theory and call bullshit on deterrence, I believe capital punishment is an archaic remnant of a barbaric society, and it demonstrates an abuse of power. Instead of punctuating my arguments with flowery rhetoric as I did in the past, I'll just go straight to the point.
Brutalization Theory/Deterrence: The easiest way to describe brutalization is "monkey see, monkey do." The more a sovereign body does something, the more likely their underlings/constituents will respond in course. The more violence our society uses to solve its problems, the more likely people will view it as a viable solution. Y'all might think this sounds silly, but there is some mighty compelling evidence that backs this theory.
Let's look at violent crimes, eh? The US stands out in that it has a fairly high violent crime rate for an industrialized democracy. People try to attribute this violence to many things, and one scapegoat is gun control. Now, I'm a liberal pansy Democrat, but I'm going to concede up front that gun control amounts to practically nothing toward solving violent crime. Why is this? Switzerland and Canada. Switzerland, with its conscription policies, require guns to be in the homes of all able bodied men. Canada has strict regulation where all firearms must be registered with the government. These two countries are practically polar opposites when it comes to gun control laws, yet both have fairly low violent crime rates, at least, when compared to the US.
What I'm getting at is violent actions are created by societies that glorify violence as a solution. If the institutions show little care to the value of life, society will tend to follow suit. What do Canada and Switzerland have in common? The lack of a death penalty. Now, I'm not going to say that all violent crime stops when you get rid of the death penalty, but I would argue that there are some compelling reasons to put credence in the theory.*
But what about the opposing theory? Deterrence?
Bullshit.
I suppose I should clarify that a little bit There are two branches of deterrence theory. One is specific deterrence, the other is general. Specific deterrence refers to the perpetrator and whether or not recidivism will take place. General deterrence refers to the example made and stopping others from committing the same crime. I'll grant that yes, the death penalty accomplishes specific deterrence because... well... you kill the person. But those that argue the death penalty is a general deterrent on other crimes are wrong.
Deterrence implies that folks will not commit capital offenses because they understand the consequence of their actions will be death. But if this were true, I have two questions for you. 1: If deterrence actually worked, why do we still have violent crime? And 2: When you're committing a capital offense, are you really thinking you'll get caught, or for that matter are you really thinking rationally?
All that you get from the death penalty is more violence.
It's an archaic remnant/abuse of power
Most people argue that the best reason for the death penalty is justice.** This next bit is a disheartening bit for me because I have to disagree with philosophers I like. John Locke, the author who brought back the natural laws of life, liberty, and property said that the death penalty was a just course of action for society. Immanuel Kant viewed the death penalty as a categorical imperative, that while it was not desirable, it was our duty to remove those folks from society. With that, however, I view it as a relic. A barbaric instrument utilized in societies wherein they had not progressed to our current level of understanding when it comes to human rights.
But this is the sticky-wicket of death penalty debates and why neither side can convince the other that they're right. It ultimately comes to one's personal definition of justice. I view it as an unjust action. We shouldn't put the power in the hands of the people to take life out of feelings of anger or revenge. We shouldn't have to lower ourselves to the criminal's level so as to give them their just desserts. My moral compass tells me that killing is wrong in all instances. It's why I, even as a secular humanist, am a CO. With that I believe we should abolish it.
In spite of my beliefs, however, I recognize that other's moral compasses point elsewhere. They believe in retribution. An equal or greater amount of pain that the victim felt must be inflicted on the criminal. Folks believe with every modicum of their existence that this view is right. I can't convince people otherwise and I've decided to stop. I disagree with these folks, and I'll state my disagreement, but I'm not going to try to change their views. I'm just going to continue voting for folks that I hope will abolish the death penalty as I'm sure they will vote for folks that will keep it in place. Yay for democracy.
In the end, I'm a realist where it counts. I recognize that war is an inescapable, despicable, and objective truth of human existence. People will have to take other folk's lives. But when we're dealing with our own citizens or people who have become entrenched in our system, we owe it to ourselves to show them and the world a greater investment in life than what they have demonstrated.
*Those of you who have had a good logic or statistics class should be calling foul on me for this argument. I can't just claim that the death penalty is causal for violent crimes, at best there would be a weak correlation, right? Well that's not the argument I'm making. I'm saying that the death penalty embodies the violent nature of a society. It symbolizes a violent culture, so to try to reduce violence we must reject institutionalized forms of it. (Death penalty, torture, etc.)
**To those that believe it's a wise policy financially as in, "Why should we pay for them when we could just kill them and be done with them?" I have two things to say to you. 1. What does money have to do with justice? and 2. It's actually more expensive to utilize the death penalty. I'm feeling lazy and don't feel like finding the sources to back that right now, but because of the legal fees required with the constant appeals that go through for every death count, keeping prisoners on death row, and other bureaucratic issues, the cost of killing a person is more than keeping them alive without parole.