You have the characteristics taken away from you. So Thiel is no longer gay once he endorses Trump. And Kanye West is no longer black when he does the same thing. This suggests that ‘black’ isn’t a skin colour, or a race – or at least not those things alone. It suggests that ‘black’ – like gay – is in fact a political ideology. This presumption goes so deep – and is so rarely mentioned – that it is generally simply assumed.