Queen's breaking the cultural boycott was what led to the Artists Against Apartheid single (I Ain't Gonna Play) Sun City. Judge them by what they do, not what they say. And what they did was offer succour to an instiutionally racist regime. By doing so they made music a way to divide people, since the only black people allowed into the gig were the ones working in the service jobs at the Sun City resort.
Queen, however, made sufficient money for the music industry that this transgression has been more or less written out of history. Vile band.