While Wikipedia is still a source to go to wet one's pallet, you shouldn't ever use it as a direct source. Doesn't mean you're wrong or right, just saying for future references.
But, I'm not sure if you read the article linked, because the figure of people dying because they were robbing people wasn't proven. Not only that, the guy who quoted this has openly endorsed and encouraged violence against white people. He said that he "thought the attacks were mostly simple robberies, but with a layer of unanswerable rage that fed them." Later goes on to say, “We kill old ones, we kill white people—of course, because we’re killing ourselves. And why do we kill ourselves? Because we’re put in subhuman conditions. Life means nothing. Why the f--- must I care for your life? Life is meaningless.” He uses their poverty level as a justification for killing people, which is never OK.
The article is titled "the Myth of White Genocide," and while it does go on to say how the numbers aren't settled and that the term was coined by a racist who is trying to lead a revolution against the other revolution, it didn't really debunk it. It just says, "the other side says this," but it doesn't provide studies and numbers. The number of people killed could be under or over counted, but I can't tell reading from this article because it doesn't provide anything of it's own. It's mainly interviewing two racists: A white supremacist and a black supremacist. Both of who are wrong while innocent people (both the ones swept up in either revolution and the bystanders) get killed.
So yeah, all that to say that anyone can be a racist. Because both sides definitely are in that situation.