This is not a problem of ideas, because if it were, the contradictions and idiocy of this sort of racism and extremism would, a bit like the internal contradictions of capitalism, collapse on itself. But like the contradictions of capitalism, it takes struggle to bring it to a close and to overturn it - the same with this racist ideology. Its own idiocy does not argue itself into oblivion, nor does a polite debate with that sort of resentment and hate end in a positive win for the left, for justice.