I cheated,
http://bnp.org.uk/2007/12/is-the-bnp-racist/
*edit* Ive already said/implied in the thread myself that BNP are racist, but it still sticks in my mind, if even they managed to get into a possition on power todays culture would stop them from totally going nuts on the ethnic minorities
My one criticism of that article is that none of those groups are seeking power, power with which could be used to enforce racist regimes. They're just organised communities taking on the act of keeping a form of pride in heritage, not political parties with views of how a country should be run.
And don't put too much faith in the public. During and after WW2 people were astonished that normal people could be so heartless to others, until a certain man named Stanley Milgram came along and proved that roughly 65% of average Joes would kill another human being just because a man in a white coat told them to.
I'd also have a look at Zimbardo's Stanford Prison study. Same theme of ordinary people performing atrocious acts for no reason other than that's the role they're given.