For it obviously
Its a double edged sword. The older generation are all for it pretty much and those 50 or over. Whereas the students are against it.
Well that's just a lie.
http://www.gallup.com/poll/14050/who-supports-death-penalty.aspx (half way down).
On a more direct note:
Justice by its very nature is about vengeance.
No it isn't, or at the very least it isn't in a modern day society.
Why do you see families/the public happy or angered by decisions?
For people like Roy Whiting, Ian Huntley, Kate and Jerry McCann (joking) i don't see the point of part of tax money being spent on them when it could go towards paying to keep a nurse in the job to help someone decent and hardworking.
Again, the cost of carrying out the death penalty is far greater than putting the person in prison for their life.
Sources have been posted above.