The southern states of the US in particular are poor when it comes to attitudes on race - never seen anything, anywhere, as bad as this.
Sometimes, it's not mean't in any way to be harmful or offensive - it's a leftover from the past which was inbred and would never leave an individual and going to take generations for that to fade away.
Sadly, least from the link story, a young generation still has this legacy to resolve - they got it from somewhere
