Does racism become acceptable on Friday 8 May?

Most of us (including, I suspect, many of UKIPs own supporters) must have been horrified at Rozanne Duncan's outburst about black people during Sunday night's "Meet The Ukippers" programme on BBC2.  UKIP have defended their position by saying that she was expelled from the Party "with immediate effect."

One small point in this has been overlooked, however. And this point lies at the very heart of why many people fear UKIP. 

After Rozanne Duncan's racist tirade, the local UKIP Press Officer turned to the camera and said, "She has been told time and time again to keep her mouth shut..." and "I might have to take her aside and tell her to tone it down until at least after the election..."

Clearly Rozanne Duncan's deeply unpleasant views were known to UKIP.  If not, why else would their Press Officer have "told her time and time again"? And why, if her unpleasant views were know, was she going to be asked to keep her mouth shut, but only "until after the election...?"  In UKIPs eyes, does racism become acceptable on Friday 8 May?

And if her views were previously known, why was she not only allowed to remain in the Party but was also reselected as a UKIP council candidate?

I can only conclude that UKIP were quite quite happy to turn a blind eye to Rozanne Duncan's extremism, until it was recorded on camera.