There is a big difference between what sex you are and what beliefs you profess: The first should not be determined by how rational you are, while the second very much should. There should be nothing surprising about the fact that more intelligent and more rational people would have different beliefs about reality than less intelligent and less rational people.

Or to put it another way: If you believe that all political affiliations should be represented equally in the sceptic/rationalist community, you are implicitly assuming that political beliefs are merely statements of personal preference instead of seeing them as claims about reality. While personal preference plays a role, I would hope that there's more to it than that.