is the UKIP nothing but a sanitized, de-vulgarized BNP/EDL?
Yes and no. They go after another segment of the population, BNP/EDL voter segment was too large degree working class, UKIP go after the conservative middle class. As such they have adapted their non-immigration and non-EU policies to reflext this. Of course their opinions on immigration and EU are the same, but they use rhetoric and methods which their voter segment find fitting.