By Geraldine Coughlan
BBC News, The Hague
The Dutch Muslim Council has attacked far-right Dutch MP Geert Wilders' politics as "racist and fascist".
The Dutch Muslim Council says Mr Wilders' politics are "fascist"
The council, which includes 200 organisations, appealed for calm ahead of the planned release by the MP of a controversial film.
Mr Wilders says his film will show the Koran as an inspiration for murder.
The Dutch Muslim Council said its members' message to the Muslim and non-Muslim world was that conflict would do no-one any good.
At a packed news conference, the council attacked Geert Wilders' right-wing politics as "racist, fascist and authoritarian" and a threat to Dutch society.
The council appealed to Mr Wilders' supporters to consider the consequences of his film after it was released.
Mr Wilders said the Dutch authorities had let him know that he may have to leave the country for his own safety.
The government is preparing for possible reactions to the film in the Netherlands and overseas, but it is adamant that freedom of expression at the heart of the Dutch constitution must be guaranteed.