Bloody hell. Did you bother to read the paper? Or anything? I just spent half a page explaining why you can't prove or even hint at causality with this kind of study. They never claimed any form of causality. The researchers are from NYU. The paper is only submitted, not accepted and hasn't been peer reviewed yet. It was presented at a conference. The funding hasn't been revealed (it should, and if I were reviewing it I would insist that section be included separately to the acknowledgments, as is common in Europe), there's no way to tell the colour of someone creating the tweets in their methodology, they do correct for racial make up of the areas, but that in itself could be a flaw.
You come along and try to explain the result with straw man examples, apparently just so you can string together a load of words you've seen lying around in the comments section of the Daily Mail. Honestly, I thought El Reg was better than that. Well, I guess they are, you can say generally what you like in the commentard sections. But equally if you're going to act like a tit there, expect to be called out for it.