Heads up, hipsters: Those keffiyeh scarves, long associated with Yasir Arafat and the Palestinian resistance, are officially ‘so over.’ While the choice of keffiyeh as fashion accessory – at least when sported by sweaty, coked-up white kids mincing for Cobra Snake – has about as much political heft as a neon Che Guevara thong, the trend’s death knell has been rung not by a sudden surge in good taste but by divisive food celebrity Rachael......