Write to your local Bishop highlight recent bad press, the need to bring the community together, non sectarianism, promoting greater understanding amongst the christian and non christian elements of the community, your very real fears for the organisation - which is clearly a valuable asset to the local community and get the other objectors to sign it.

Tribal catholicism is not good for the church or the community and it is important (for the church) not to alienate others as has been happening recently. I think that you might get a pleasnt suprise (if he responds at all - if he dosn't then think of your self and your own christian commitment to all people) - if it is negative leave. Or even better get as many non catholics elected onto next years committee.

Just some thoughts Good luck
Fr John