Yes we are all born evil.
None of us is more than a heartbeat away from committing the most heinous crime we can imagine.
Some of the responses here, and some of the responses of my own heart, in articulating what should be done with those who act on their evil imaginations, reveal just how evil we all really are.
The difference is whether a person acts on his evil imaginations.
I have known some children born into really good Christian homes that end up committed to living evil lives, even while their siblings are committed to Christ.
Ultimately, God allows us all to make our own choices. Some people are just inclined to make the wrong ones.
And, yes, the murderers must be put to death, if for no other reason than to prevent them from doing it again.
That's one of the worst parts of conservatism among people who pride themselves in being conservative and yet don't really have an appreciation of what the term signifies--particularly some who plume themselves on their Christianity.