I see absolutely nothing wrong with that sentence--after all, sometimes you need long sentences to break up the flow of a paragraph (and in any case, it seems that this semicolon use is exclusively a choice the author made to articulate and punctuate a point)--but you do bring up an interesting point, namely, #animmensepileoffilth. Sentences, man. Sentences.
I'm not sure that's the point. I thought the point was that these guys are so clueless or so hopelessly lost to politickin' that they can't call out something for what it is. In this case, a giant piece of shit backed by a culture of racism who carefully calculated and murdered a bunch of peaceful church–going people because they were black.
That was my interpretation of flagamuffin's intent too. Only person who really knows is flag tho. How about it flag? Run on sentence or ridiculous politicians?