Care to specify where the BNP has judged someone on skin colour? You clearly have not read the manifesto.

BNP Manifesto
In account of that, and also in the understanding that genocide through integration is a threat to all peoples across the world, we also intend to develop a model of 'multi-culturalism' which combines peaceful co-existence with the maintenance of cultural and biological separation. In parts of the world where mass immigration is irreversible, the only thing that can prevent human diversity vanishing into an antheap of rootless coffee-coloured consumerism is the celebration of difference.