As a counter to the simplistic idea that UKIP can be dismissed or demonised as racist, you might be interested to read this election communication from one of their candidates in Enfield
Not sure how we might counter this, but simply shouting racist isn't likely to do it.
ETA sorry, this is unreadable. Here's some of what it says
I read this as an appeal for the votes of for those with family ties in parts of the Commonwealth, eg the Caribbean or Indian sub-continent. How successful it's likely to be is another matter.