text: Tun a shekarar 2011 ƙungiyar Boko Haram, wadda ƙungiya ce ta jihadin musulunci a Arewa-maso-yammacin Nijeriya ta jefa tsoro a zukatan mutane da kuma rarraba kan al'umma ta hanyar kai hare-hare da suka yi sanadiyyar mutuwar dubunan mutane da kuma tarwatsa miliyoyi.