In domestic elections like Oldham East, UKIP tends to do best amongst disaffected working class voters, who find UKIP’s populist attacks on immigrants, Muslims and the political establishment attractive. UKIP appeals to the same kind of voters as the BNP, but may be able to recruit a broader and more sustainable vote base, with UKIP voters outnumbering BNP voters three to one. While many voters who agree with the BNP’s political messages, they are turned off by its violent and fascist reputation. UKIP suffers no such legitimacy problems. It is in a position to not only recruit a much broader base of BNP support, but a much more sustainable base.
As editor of VDARE.com, I find American readers more interested in the British National Party, probably for the reverse reason (I translate here from liberalese): they are not affected by the subtle class cues that mean so much in British culture and just focus on its message.
I've spent a fair amount of my professional life predicting the emergence of new parties: in Quebec; in English Canada; in the U.S.; in the U.K. It's never popular. But it happens, inconveniencing conventional MSM courtiers more often than they like to like to admit.