Ukip is facing calls to sack one of its candidates who apparently denied the Holocaust and promoted wild conspiracy theories online.
A Facebook profile in the name of Anna-Marie Crampton, who is standing for the Eurosceptic party in the local elections in East Sussex next week, posted that the Second World War had been "engineered by the Zionist jews", adding: "Only the Zionists could sacrifice their own in the gas chambers."
On Twitter, there were references to the 'false flag' conspiracy theory about the Boston Marathon bombings and links to UFO sites.
The Jewish comments, revealed by Brighton's Argus newspaper, were posted by Crampton's Facebook account - which includes photos of her with Ukip leader Nigel Farage - on an online forum entitled 'Was Pope Benedict fired by the Knights of Malta?'
The entry in Crampton's name said: "Of coure he was" and went on to say "The Rothschilds are Zionists... there is a difference between Jews and Zionists. These Psychopaths hide behind and use the Jews. It was thanks to them that 6 million Jews were murdered in the War (along with 26 million Russians!)"
Ukip told The Argus it would not comment until it had contacted Crampton.
And Sam Westrop, director of interfaith organisation Stand For Peace, told the paper: “UKIP, to its credit, has expelled extremist and bigoted members in the past.
“They must also expel Anna-Marie Crampton. Such hatred must be fought at all times.”
Ukip has again been asked to comment but has yet to respond.