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Many of them featured in the article are leftists.
Predictably, for a couple of reasons. Obviously MSM outlets skew liberal with their message, as expressed through their content. Also, outbursts like that idiot's seem to be predominantly by Progs, who then dominate the population of "victims".
As for the twit in your quote, he found and drove to a CfA, went through the drive-through line, and unloaded on the (probably teenaged) employee whose "sin" was working there. That was not a slip-of-the-tongue "mistake" that was calculated and planned moronicity. The death threats and doxxing of his family were utterly wrong, but stupidity has consequences, and sometimes consequences of escalated stupidity.