There's a fine line with race issues. For one thing, if two people of the same race crack jokes about their race, maybe even use a slur, it might considered "ok"; however, if someone of another race says that, it's racism. It's just one of the unspoken rules of society, I guess. And one that perhaps Kent tread, unknowingly, and Bradley instead of addressing it privately (or maybe he did, I don't know), blabbered to the media.
More often than not, however, the "racism cry" is taken far out of context.