BNP - A Leftist, Dying Party.

Why is it that Labour who have former BNP councillors in their ranks (as well as far too many paedophiles), but UKIP which is the only political party not to accept ex-BNP members, is claimed to be similar to the BNP?
Basically the BNP, which is obviously hard left being in favour of state control of most things, including the means of production, is more allied to Labour than anyone else. Leo Savantt comments/replies in the Telegraph.