The BNP are a malicious bunch. They regularly post articles on their website designed to incite racism in Britain, and reinforce some of the nonsense that their supporters believe.
A common tactic is to build a tale of evil asians getting away with all kinds of crime and violence while innocent white people are victimised. They paint a picture of a government hell-bent on supporting ethnic groups to the detriment of white people. BNP is then presented as the saviour of the repressed white citizens. While occasionally there are elements of truth, their stories are the equivalent of the worst kind of tabloid journalism.
A good example of this was discussed here:
http://www.ukipforum.co.uk/viewtopic.php?t=16