You cant pin down human nature on the whole species, we are just too different.
I actually beileve its in some peoples natures to be self destructive and murderous, its called being psychotic.
There is increasing evidence of a "criminal" gene, and if thats the case, then it IS in some peoples nature to be different.
Of course it is in some people. But would you consider these people normal?
Anything more than a yes or a no does not answer the question.
If it is a no then the argument is over. Because normalicy is what drives this world.