Shorty, I'm sorry but your arguments just sound weak and fuelled by Daily Mail-esque scare stories about 'the state of our country (exclamation mark!!)'. It's silly. The country is no worse 'state' and is probably in a much better 'state' than it has ever been at any point in history, so you can calm down about that.
In answer to your question, I left Stoke Newington last year, so was in Finsbury Park on a daily basis until then as it was my nearest tube station. It's a highly mixed area - a lot of Poles, North Africans, West Africans, West Indians, and still a fair few Irish. I'm sure there is some racial tension there - the world is not a perfect place and it is sometimes difficult for lots of different types of people to all get along - but on the whole, most people in that area are able to live together and get on with it, as they are in Stokie or Dalston or Camberwell or Kilburn or any of the other multiculutural areas with pockets of social deprivation that I have personally lived in in London.
The BNP prey on people who are unable to look at the bigger picture. It's so easy to blame 'immigrants' for all society's ills (immigranst, by the way, often seems to include all sorts of different people - from asylum seekers and refugees, to British born Asians in the East End, to Poles, who are EU members and legally perfectly entitled to live and work here...).
Those who voted for the BNP -well, I pity them. They will end up vile, bitter racists ranting about 'foreigners\ while the rest of us get on with our lives and thank God we live in such an amazing city.