When hateful people do heinous things, the fault most often lies with no one but themselves.

In the wake of a grotesque attack by four black youths on a disabled white man, which was streamed on Facebook Live, some people in the crank-left portion of the political spectrum blamed President-elect Trump’s rhetoric. Over in the crank-right portion of the spectrum, there were people blaming Black Lives Matter. Others blamed Facebook for providing the means for exhibitionists to draw attention to their depravity.