Edit:
re pupptailwags: Yes we should be examining whenever people are engaging in violence, factors behind that happening. I'm quite certain, unlike assertion made below, that people indeed have studied the qualities of males in particular engaging in this kind of violence.
rethelopa: I was replying to a comment talking about why something (male disposition to this kind of violence) hadn't been studied; it has.
[note I'm rate limited, which is reason for replying this way]