SAN FRANCISCO: San Francisco 49ers quarterback Colin Kaepernick said Tuesday he has received death threats over his national anthem protest as the killing of an unarmed black man in Oklahoma sparked renewed outrage. Kaepernick has staged a silent boycott of “The Star-Spangled Banner” during 49ers games this season, pointedly sitting or kneeling during renditions of the song rather than standing. The 28-year-old says he is protesting racial inequality and injustice in America, including the actions of law enforcement towards minorities. Kaepernick told reporters on Tuesday he had received threats from different avenues since starting his protest. The quarterback said he had anticipated the backlash before he embarked on his protest.