And part of it is the expectation that only straight white Christian men can be objective. Somehow, it is assumed that a minority, a woman, or a gay person can't see the world apart from their membership in those groups.
So there is some fuss when the White House seems upset at a rumor that Elena Kagan may be a lesbian. (Hint: the proper response to a rumor is, "so what?")
And then the American Family Association of stupidity and bigotry comes out with this (quoted via Andrew Sullivan, I will not link to a hate site):
"With an active homosexual on the bench, Lady Justice will no longer even pretend to be blind. She will be peeking out from under her blindfold to determine the sexual preference of those standing before her, then will let the fold slip back into place before ruling in every case to legitimize sexual deviancy. Bottom line: the American ideal of absolute equality before the law will inevitably be shredded by a homosexual judge. Neither the Constitution nor the American people should be subjected to that kind of judicial malpractice. We can and should expect more from those who occupy seats on the highest bench in the land,"Now, replace the word "gay" with "Christian" and "sexual preference" with "religion" and see how offensive that really is.