The BNP at least raise issues the main three never directly tackle. I'm glad there are extreme parties like the BNP around, purely for the fact that Westminster will have to stop kidding themselves that the consensus they come to is necessarily the one shared by the people.
The BNP are popular among some million people (who voted for them) because they take an unambiguous position on such things as immigration and Europe. Without these two, they would still be hidden away in the darkness.
But don't get me wrong, Question Time will soon obliterate any credibility Griffin and his cohorts gained at the election in June. Labour will come out looking terrible after all this blows over (their over-reaction to real adversity)