Diversity and Discrimination at Seton Hall

Yesterday a student filed suit against Seton Hall University after the school rejected his request to establish a gay student group on campus. I'm not sure as to the details of the student's request or the school's denial, but it raises an interesting point to follow up on Rick's post about Gonzaga. To the extent we value expressive liberty and associational identity, whose identity and expression should we support: the student group's or the university's? If the Gonzaga student government is trying to impose a collective, identity-squelching anti-discrimination norm on its student groups, isn't Seton Hall doing the same thing when it tries to enforce standards based on the Church's teaching? Besides the fact that we might favor the substance of one collective norm over the other, is there any principled reason for supporting the students trying to create a Christian Legal Society chapter at Gonzaga, but not the student trying to create a gay student group at Seton Hall?

Rob