Doesn't a private club have a right to exclude someone--especially if he espouses views totally contrary to what the club stands for? How can you possibly have a campus club/group with any independence if the university gets to determine its membership policies?
I'd fight for the right of NAACP to exclude anyone for any reason it wants...
I am going to start a new organization, The National Association for the Advancement of Caucasian People! It will be known by the initials...mmm, that oughta fly like a lead balloon.