(I am British. I live in Spain with my Filipina wife)
There is a problem of immigration in the UK, which is not being addressed by the main political parties. For that reason I believe many are looking at the BNP for help and for a voice.
If the main parties get of the stupid PC bandwagon and start discussing the problems openly and start doing something about them, the BNP will be left with almost no support. If they don’t the BNP will a party to be reckoned with after the next election.
In Spain if a Brit gets in trouble with the law the vast majority of Brits support the official action. They do not start marching to ‘defend that persons rights’ just because he/she is a Brit.
I would expect the same action from minorities in the UK, unfortunately it appears from the media that whenever a person from a minority gets into trouble there are claims that the authorities are being racist and marches are organised. For example. When Jean Charles de Menezes was shot at Stockwell, the fact that he was Brazilian had nothing to do with the rights or wrongs of the police action but immediate his nationality became a substantial part of the media cover.
When every Brit, whatever there origin, accepts they are British first and supports the actions of the authorities, regardless of that person's origin, they are more likely to be accepted by all as being British. Whilst they continue to marginalise themselves they cannot expect to be ‘accepted.’