I agree, I do not support capital punishment from a revenge point of view - quite honestly, if I was out for revenge, I'd be much happier seeing someone locked up in a cell for the rest of eternity. Don't kid yourself, dangerous offenders typically live in solitary confinement and I'd sure as heck choose death over that any day.
I just believe that if you are a menace to society, regardless of species, you should not have the right to be in society. And we should not be obliged to care for you. If you can't follow the rules and continue to be a danger to everyone around you, then you shouldn't be allowed to exist.
However, I am also very "liberal" about death. I think it's SICKENING how many resources we put into keeping a 90 year old woman with terminal cancer alive and pumped with pain meds just so she doesn't claw her own eyes out. I think it is asinine that we are so terrified of death that suicide and assisted suicide are ILLEGAL. It is my body, it is my life, it is MY decision how I end it.
I'll never forget reading a Reader's Digest article where a woman wrote in about assisted suicide and basically said "Every single day of my life is spent in excruciating pain. If a horse broke it's leg, you would put it to sleep or you would be charged with cruelty. How is it we treat our animals better then we treat our people?"
Obviously a horse can break it's leg and survive, but you get the point of what she was trying to say and it's always really stuck close to home for me.