Black people are the fathers and mothers of civilization, white men are the devil, the Christian god is nothing more than a ghost and only a small percentage of people understand the world. These are just some of the beliefs behind the bling — the gaudy Five Percent Nation medallions worn by Jay Z and Carmelo Anthony. Last week, all eyes at the Barclays Center weren’t on Jay Z’s better half, Beyoncé — but on the coaster-size golden pendant swinging from the rapper’s neck as the couple sat courtside. Asked once if the group’s symbol — an eight-pointed star with...