You may not like the UKs Immigration Policy but it is certainly not 'Open Door', if by that term you mean anyone who wants to can come here to live (and scrounge) can do so. They cannot.
Your post further down, you state that the BNP are not as bad as their image. This suggests to me you have sympathies with them. I consider the BNP to be race obsessed and discriminatory, which is a roundabout way of saying they are racist.
If you are indeed considering a vote for the BNP, then you either don't understand their policies or if you do and agree with their policies, then you must be racist.
Or maybe you are just fed up with all the major parties and you would vote for the BNP despite their racism, which means it doesn't really bother you.