UNITED NATIONS ? Civilians in South Sudan have been the main target of recent ethnic violence that likely killed thousands and subjected thousands more to rape, arbitrary arrest, torture and the looting and burning of their homes, the United Nations said Friday in its first report on human rights abuses during the conflict. The U.N. peacekeeping mission in South Sudan said the report on the progress of human rights investigations during the first six weeks of the crisis, from Dec. 15 through Jan. 31, offers a quot;snapshotquot; of the violence perpetrated mainly by forces loyal to President Salva Kiir, who is an ethnic Dinka, and rebel soldiers loyal to dismissed former vice president Riek...