OK, I'll concede that far left probably isn't appropriate, but what is termed and attacked as "PC gorn mad", which is very much viewed as leftism, has a significant relevance and impact to many people. Even the little things start to stack up and when they're pointed out it's branded as racist.
For example;
Back in 2006 a colleague of mine was given a fixed penalty parking ticket in Oldham when he parked his car, albiet on double yellows to nip into a newsagent to get some cigarettes.
When he came out he was pissed off and made the usual protestations about being there for a few minutes only. Needless to say the offense stuck and he paid his fine, he grumped about it all day.
Two weeks later we both popped out for lunch, he was driving and looking for a parking space very close to the newsagents where he'd recieved his ticket. There were cars everywhere, on the pavement, on yellow lines and even double parked. Then he spotted the traffic warden who'd issued his ticket just walking past all these cars.
He wound down his window and yelled at the warden to ticket all the cars that were illegally parked, when he was ignored he saw red and got out of the car and walked over the Warden and asked, not politely admittedly, why he wasn't issuing tickets and the reply was, and I quote "It's prayer time and I've been told not create any problems because this is a Muslim area"
When he got back in he car he was purple with rage and his anger was with the warden, the council, the left and PC madness and sadly Muslims. This sentiment was taken back to the office where he was sympathised with, everyone seemed to have a story to tell, and these weren't white working class people these were articalute and educated middle class people. The only person who tried to put some balance to the situation was myself.
The problem is that there is a significant silent minority of people who, because of the small issues they've experienced regarding instances such as the one I've described, believe the outright lies and propoganda that the BNP and the media are prone to spout.
If you talk to BNP sympathisers, for want of a better expression, and tell them about the BNP immigration policy and how they'd remove British Citizenship for non whites etc, they are appalled and use the classic, I have a black/muslim/Indian (delete as required) friend. They do not believe their views are racist and they do not believe that they themselves are, but they do feel afriad to talk about racial issues for fear of being branded as such and are afraid of sanctions being taken against them.
Is it any wonder then that when the new and improved men in suits from the BNP show up with an entourage of screaming UAF nut jobs screaming and attacking them that they aren't discouraged from supprting them even if it isn;t overtly?