Psychopaths, plain and simple.<p>In the US, there is no incentive for psychopaths to kill people like this.  In China there is.<p>Also remember that the incidence of this in a country the size of China doesn&#x27;t allow you to make comparison to the US.  Our population is much smaller.<p>Lastly, the per-capita murder rate in the US is higher (we rank 110, they rank 192) [1].  Even if you account for under-reporting in China, we have a more violent society.<p>[1] <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;List_of_countries_by_intentional_homicide_rate#By_country" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;List_of_countries_by_intention...</a>
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