By Lynsey Chutel and Michelle Broder Van Dyke May 15, 2021 JOHANNESBURG — A plane from Honolulu landed in Johannesburg earlier this month and offloaded a plastic-wrapped coffin carrying the body of Lindani Myeni, a South African rugby player, aspiring singer and father. In the airport’s cargo terminal, a youth contingent from the African National Congress party waved a “Black Lives Matter” banner emblazoned with his smiling face. His widow, Lindsay Myeni, a white American from Hawaii, cradled their 6-month-old daughter and kept watch over their 2-year-old son, while Mr. Myeni’s South African family held onto one another in grief. Mr. Myeni, 29, died in Honolulu after he was shot in a confrontation with the police outside a suburban house he had inexplicably entered, and then left,