Actually according to Judaism it is a fact that people are born with predilections to murder any one born under the Mazal Maadim, every person is born with a personality that allows for them to either be a “rusha” a “a “beinuni” or a tzadik.
Someone born under the Mazal Maadim essentially enjoys “blood’ so they can be either
1) A rotzaech, murderer which is a rusha
2) A Shocheit, ritual slaughterer, which is a beinoni.
3) A Mohel, circumcisor, which is a tsaddik.
And what I have written is essentially a quote from the Vilna Gaon brought in Even Shelaima.