I quite agree, the BNP have to be confronted with constructive policy debate, not insults. Their analysis of the ills of British working class is based on the mistaken premise that is all the fault of "foreigners" and whilst they perpetuate this myth the solutions to those problems will elude them.
I suspect though that the main parties will court the disaffected BNP vote by pandering to their prejudices rather than seriously tackling urban poverty, such is the intellectual vacuum at the heart of the "labour" and tory parties.
That's spot on.
The BNP reinforces and plays on people's prejudices. It offers little in the way of serious analysis or solutions.