Are you under the impression, Messi, that Albert Pierrepoint for example was a ripper of defenceless animals? Obviously, I've no idea how old you are but, if you've never heard of him, I'm sure Google will provide the information. Indeed, have you a shred of evidence that any public executioner anywhere at any time EVER ripped an animal?
As regards morals, J, I - a committed atheist - quite believe in the concept of "an eye for an eye", though not necessarily literally. Indeed, I'm often surprised at how selective Christians consider themselves entitled to be as regards their Bible. Matthew 18 v6 in the King James version reads,
"But whoso shall offend one of these little ones (which believe in me) it were better for him that a millstone were hanged about his neck and that he were drowned in the depth of the sea."
There doesn't appear to be any rooted objection there to capital punishment. The brackets are mine, of course, as I can think of no rational reason why children who DON'T believe in him should be fair game. I daresay there has been some concocted explanation to get round the meaning of 'offend', but I myself think that killing one of them is just about as grave an offence as it's possible to commit!