Meet Mattel’s latest doll: dressed conservatively, covered head to toe with only her hands and face visible. The fabric she wears is extra-thick, so there’s no chance of seeing skin. This Barbie wears no adornments. She also wears a hijab. This new Barbie has been spun by Mattel and the doll’s inspiration, Muslim Olympic fencer Ibtihaj Muhammad, as “empowering” for young girls. Really? Growing up in Maplewood, New Jersey, Muhammad wasn’t an integrated American teen: Her parents insisted she cover up at all times, even when playing on volleyball and softball teams. In 2011, she told the Wall Street Journal...