I can't disagree with Dale Carpenter's thoughts about the Prop. 8 trial. But I think they ultimately just reiterate the problem: we can't rely on the constitution when it promises equal protection, and that's mostly because of politics.
I know Dale has reasons he believes a court could find rational enough to support inequal marriage laws, and as a professor of constitutional law, he speaks with some authority on that point. But here, his concerns are almost all political ones: about liberal and conservative justices; the mercurial Justice Kennedy; the filibuster rule on a possible replacement for Justice Stevens (should he ultimately need replacing; he's proven to have some kind of stamina).
Dale's not kidding about any of that. But the constitution does make a promise, and the courts were established as the branch most immunized from politics so that such constitutional promises would be reviewed by cooler heads.
The equal protection clause in particular doesn't need to mean a lot to mean something. It obviously isn't necessary for political majorities. It must protect minorities from something. The questions are (a) which minorities, and (b) what somethings? As an extremely small minority, and one that has a long history of quite vivid discrimination, both in the law, itself, and in the culture, I think lesbians and gay men have to qualify somehow under (a). Perhaps marriage isn't one of (b)'s somethings, but all of the court cases declaring marriage as a fundamental right tell me that state recognition of marriages has to be one of the laws that ought to be applied equally to all citizens, not just the majority.
As we learned with Bowers v. Hardwick, politics and pretty offensive notions about homosexuals still color the opinions of some judges at even the highest level. I have no doubt that the uglier language and insinuations in that case would not appear so publicly in an opinion upholding unequal marriage rights today. But the opinion would have to use the highest level of deference to the political will of the majority (which in the case of Prop. 8 is the voters themselves), and would have to accept reasons I think are little more than other ways of saying "Because we said so."
And that is taking it for granted that laws discriminating based on sexual orientation should be given no special regard at all. Sexual orientation doesn't need to be entitled to the highest level of scrutiny in order to fit into the middle tier of review, where laws have to be supported by something more than wink-and-a-nod rationality. There is more than adequate evidence already in the record that the proponents of Prop. 8 knew the value of misinformation and untruths in courting the votes they needed.
That's hardly unusual in politics, but there's a difference between when a politician loses an election because of unfair - and even unethical - reasons, and when a constitution is being altered to take away a right from a minority that had been specifically recognized. One person is affected unfairly in the former, but a whole group of people bears the burden of the latter.
This will be a hard case for any court. Same-sex marriage is acutely political. But that's exactly the reason we need courts - to tell us, every now and then, that politics has prevailed over justice, not achieved it. In those uncommon cases, if courts, too, bow to politics, we have little need for them.