Okay, well let's take some concrete examples then.
Here's Anne Marie Crampton, admittedly not a terribly recent one, but she was put forward as a candidate by UKIP in a local election and denies that the holocaust ever happened:
http://www.theargus.co.uk/news/10378900.East_Sussex_UKIP_election_candidate_in_holocaust_storm/
Then there was Eric Kitson - one of UKIP's elected councillors last time - who said that Muslim women should be hanged and was forced to resign:
http://news.sky.com/story/1091098/ukip-councillor-eric-kitson-resigns
(Mr Kitson had been posting this stuff for a year - UKIP did nothing until the press found it)
Dr Julia Gasper used UKIP's own members' forum, and claimed that homosexuality and paedophilia were linked (the article also mentions other UKIP members who said the same thing on the same forum):
http://www.mirror.co.uk/news/uk-news/ugly-face-ukip-sunday-mirror-1531879
One of UKIp's less-reported candidates this year had been saying that "there is no such thing as a benign muslim"
http://www.hastingsobserver.co.uk/news/local/ukip-candidate-sparks-anger-over-remark-1-6035107
And this is all before getting into the better-reported candidates (and even elected councillors) who have slipped through UKIP's incredibly loose/virtually non-existent net.
Now, I'm not claiming these people represent the average UKIP member or voter. But they do represent a total lack of concern for vetting candidates. Anyone who voted UKIP last week actually has a decent chance of putting such a person in public office - far more so than any of the other parties.