Ruth Weiss, a South African journalist forged by the Nazi persecution she experienced as a child in Germany, who covered the malignant flowering of apartheid in the early 1960s and later wrote about the brutal white regime in Rhodesia before being expelled from the country, died on Sept. 5 at a hospital in Aalborg, Denmark. She was 101. Her death was announced by the nonprofit organization Ruth Weiss Gesellschaft, founded in Germany by Ms. Weiss’s friends to promote her work. Her long life and the hundreds of articles and many books she wrote were shaped by twin experiences of discrimination:...