I blogged about the charges, here, back in 2013. Dylan was responding to the question "Do you see any parallels between the 1860s and present-day America?" And he gave the following answer, within which I've boldfaced the words that led to the complaint:
Mmm, I don't know how to put it. It's like . . . the United States burned and destroyed itself for the sake of slavery. The USA wouldn't give it up. It had to be grinded out. The whole system had to be ripped out with force. A lot of killing. What, like, 500,000 people? A lot of destruction to end slavery. And that's what it really was all about.
This country is just too fucked up about color. It's a distraction. People at each other's throats just because they are of a different color. It's the height of insanity, and it will hold any nation back – or any neighborhood back. Or any anything back. Blacks know that some whites didn't want to give up slavery – that if they had their way, they would still be under the yoke, and they can't pretend they don't know that. If you got a slave master or Klan in your blood, blacks can sense that. That stuff lingers to this day. Just like Jews can sense Nazi blood and the Serbs can sense Croatian blood.
It's doubtful that America's ever going to get rid of that stigmatization. It's a country founded on the backs of slaves. You know what I mean? Because it goes way back. It's the root cause. If slavery had been given up in a more peaceful way, America would be far ahead today. Whoever invented the idea "lost cause . . . ." There's nothing heroic about any lost cause. No such thing, though there are people who still believe it.