The leader of the far-right British National Party told followers Muslims had turned Britain into a "multi-racial hellhole", a court heard.
The trial began today of Nick Griffin (45) and fellow BNP member Mark Collett (24), who are accused of using threatening, abusive or insulting words towards people of "Asian ethnicity" in speeches to supporters that were filmed by an undercover journalist.
Rodney Jameson, prosecuting, said the charges related to six speeches at private party meetings made by Mr Griffin and Mr Collett that were secretly filmed by a BBC reporter who had joined the BNP in December 2003.
They were later screened as part of the BBC's The Secret Agentdocumentary series in July 2004.
"White society has been turned to a multi-racial hellhole - vote BNP so we can ensure the British people really realise the evil of what these people have done to our country," Mr Jameson quoted Mr Griffin as saying in a speech in January 2004.
Referring to violent incidents involving Muslims, Mr Jameson said Mr Griffin told the meeting: "These are going to continue because that is what the Koran says is acceptable."
Mr Jameson said Mr Collett had told the same meeting: "People living in Bradford and Keighley (in northern England) live in hell. This is because of rape and muggings. This is always by Asians on white people."
The BNP is a marginal party with an anti-immigration stance on the fringe of British politics.
Of Britain's 60 million people, some 1.6 million are Muslims.