I'm an atheist. There is no god nor gods. But if I had to have a god, I don't think I'd choose one of the abrahamic ones. There are many to choose from who aren't big on mercy.
>Its also messed up ethics.
I don't accept your ethical framework. It's a system of bullshit rules made up by people who care for me not even a little to put me and my family at a disadvantage against a civilization that doesn't even want to go on living.
>The purpose of having the government administer punishment for crime is to prevent vendetta.
Then you're doing it wrong. It can only prevent vendetta if the victims feel as if they receive justice... if those who do wrong are punished. If you remove the punishment/cruelty from the equation, they will simply do that part themselves. Unless you're hoping to emasculate and disarm them so thoroughly that they have no hope of doing so... but I guess that was the ethics stuff you were talking about above.