South African President Cyril Ramaphosa defended the “Kill the Boer” slogan as a “liberation chant” Tuesday, refusing U.S. President Donald Trump’s demand to arrest opposition figure Julius Malema for using it. Last Wednesday, during a meeting in the Oval Office, Trump accused South Africa of “genocide” and showed a video of Malema and his Economic Freedom Fighters (EFF) party chanting “Kill the Boer,” “Kill the farmer,” “Shoot to kill,” and other violent slogans at large rallies. Trump said that Malema ought to be arrested for incitement. Malema responded by repeating the slogan, both online and in another rally Sunday. Ramaphosa...