I thank you for that. The point I was hoping to make, which you have very nicely demonstrated, is that it is an individual issue, and not something that we can attribute to one (non-aligned) group or other.The most often cited factors in the development of violent behaviors are the following (no particular order) according to criminal statistics and studies:
Being a man;
Being between 14 and 28;
history of child abuse or neglect;
exposure to lead or mold in the breathing air;
social isolation;
scoring high on the social dominance scale of personnality;
certain mental illnesses like psychosis;
lack of employment;
history of substance abuse;
contact with violent political ideologies (jihadist, neo-nazi, etc)
I probably forgot a few ones, but I'm pretty damn sure that religion isn't there unless it's a very weird cult or some bad mix of religion and violent political ideoloy. Criminality in humans seems to be a strange mix of economical problem and healthcare problem.
(By non-aligned, of course, I mean that if joined a violent gang, you'll be violent because of your affiliation. A black person or white person, a Christian, Muslim, Jew or Atheist, gay or straight, tall or short, is not necessarily violent or non-violent by virtue of their inclusion is any of those groups.)