[Godel]

The need to commit murders is not inborn in every human being, and is therefore not an appropriate comparison

History would seem to disprove that assertion.

[UnsinkableMollyBrown]

Can't believe you said that. Of all the people that have lived on the earth, only a fraction of a percentage of them were born with a thirst for blood. (Granted some developed that need with extra effort) It is certainly not a universal human need, and it doesn't come naturally.