Why would they shout KKK?

It's partly the environment of the conservative right, it's partly the long history of institutionalized racism, and it's partly because "we" are treated differently by "them". This wasn't a case in which maybe these guys didn't do it (maybe it was someone else), but a case of why did they do it. And it's easy to see why the people were upset. Let the thing settle for a little while. I know white people are highly sensitive about 'reverse discrimination', but let's face it, if there hadn't been discrimination in the first place, THEN blacks would have no argument.