James Kilroy was an autistic IT security nerd who took far too many drugs that he knew had the effect of making him strange and withdrawn rather than cheerful and more open to creative insight. But he continued to take them over many years.
The point being there is typically something i
n your environment that conditions you over an extended period of time to commit such acts.
It might be extended drug abuse that interacted with a preexisting mental issue, it might be horrific abuse you haven't dealt with, i
t might be a turn of mind that makes you interpret your place in a patriarchal culture as having women and children subject to you, and many other possibilities.
And with respect to the background of this chap, listen to this woman for instance
describe some of the dynamics within Islamism that affect women.
Crucially though, what it certainly not is
genetic. The claim it is so is making things worse. Because this claim based on pseudo science, and half witted ideas, and vast conurbations of online idiot squads "meme-ing" these ideas and pseudo science to each other, and so on, claiming that this is the important factor operating,
is simply racism.
A racism profoundly discarded by history.
This is a problem. It is a problem when racists insist this is the factor. The reason being that
if it is cultural elements that we ought to look to in this case, anyone who doesn't want that factor examined can easily cry "racism" with justification. They can easily
conflate the cultural element with racism, and the racists give them justification for doing so.