That would depend on what your definition of &quot;conventionally disturbed&quot; is. Most modern diagnostic psychology is based upon deviations from some kind of norm (it&#x27;s greatest weakness, because then you have to define the &quot;norm&quot;, not easy to do objectively)<p>..but it doesn&#x27;t change the fact that <i>most</i> people would find the idea of picking up a weapon and killing random innocent people to be completely abhorrent. Given that definition, yes, I could see how &quot;disturbed&quot; or &quot;mentally ill&quot; fits. Having the mindset that committing mass murder is okay or justifiable is an aberrant thought pattern. Full stop, end of story.<p>Address that pattern, and you address the root of the problem.<p>I find the idea that &quot;desensitiation to violence&quot; is at all meaningful to be spurious at best. More tractable types believe the media narrative about, say, Columbine being caused by the shooters being avid fans of the FPS game Doom, but study after study can&#x27;t find a link between games and real life violence.<p>There&#x27;s also proof by inversion - the USA is famously inverse of the rest of the world, puritanical when it comes to sex, okay with violence. Therefore, you&#x27;d expect if the desensitization idea held any water, that the rest of the civilized world has a bigger problem than the USA with sexually-based crimes. I haven&#x27;t seen evidence to that effect.