It would be a problem if the student body suddenly turned conservative, but that's about as likely to happen as a Ralph Nader victory in November. We're far more likely to have a student body that is too liberal. Macalester is threatened by a lack of political and ideological diversity. That's why we're happy to see groups like Students for a Republican Revolution and the Mac Greens emerging. It's why we're glad to see that students will try to charter a group called The Council for Religious Understanding at the next MCSG meeting.
Diversity is something to be welcomed.
It is useful to interact with people whose beliefs are different from yours. Through discussion, you can gain a better understanding about why you feel the way you do. Opposition forces you to define and support your position. You'll have to do this in the real world. Macalester is not the real world.