council's race equality committee is facing collapse after Conservative leaders appointed a BNP member in a move denounced by opponents as a joke.  Labour councillors in Calderdale, West Yorkshire, are considering withdrawing from the committee, possibly with Liberal Democrat colleagues, unless the appointment of councillor Adrian Marsden is overturned.  His appointment was condemned yesterday by Alice Mahon, Labour MP for Halifax, as flouting the council's commitment to social diversity and making Calderdale a national laughing stock.  She said: It must be clear that this man can contribute nothing that would be of benefit to this working party.   Mr Marsden, who was re-elected last month for the council's Town ward, behind two Labour councillors, said he had plenty to contribute and was being unfairly attacked. The BNP was keen to do its bit on the all-party race equality and community cohesion whose remit is to improve local race relations.  Calderdale's three BNP councillors had targeted committees which need our input, he said. I have a clear idea of how I believe we can bring an end to all the racist stuff there is in Halifax.    OLD NEWS ALERT...........OLD NEWS ALERT............July 10, 2004