That's not so much the point though, the death penalty sends a message to others.
If you do this, then you'll die. Like if you ride a rollercoaster without being in safely, you're going to fall out... and die.
The tip is this, get in safely.
It's the same thing, do this and you'll die.
Criminals get free room and 3 meals a day. If prison was hell, I'd agree with you but heck I actually know people who are perfectly content with going in and out of prison.
They feel no remorse for their actions and constantly do it over again.
That being said, fear needs to be put back into people to help prevent future actions.
And by that I mean using the death penalty on someone who is no doubt about it guilty.
I say again that it isn't done right away, I've heard of cases where someone was on death row for 10 years - some were executed and others were let go.
Also, parole. Rapists, murderers, anyone gets a chance for parole even when it's stated that they get no chance for it.
Also, old people... not as harmless as you think. Being batshit insane doesn't change, young or old.
People like Manson and all his followers, those people shouldn't exist in this world because it will constantly infect a new generation.
Morbid curiosity. If someone were to find their criminal fascination were alive, then they would want to prove to them how well they can recreate what they've done to them.
And, yes, there are people this insane in the world.
There's more than meets the eye with this thing.