Well, I suppose you could start by reading the article, if you're truly interested. He doesn't go into great detail, but he gives an indication (see below). You haven't even read the opinion. I have, but I also fully understand that the judge's written opinion is not a complete summary of the factual record--it basically says only what he chooses to say. I'm assuming Meese has looked at the record. Among other things, he says:
1. "Despite voluminous evidence and common sense pointing to the contrary, the judge also declared that opposite sexes were never part of the "historical core of the institution of marriage"
2. "Walker's opinion pretends that the voluminous evidence introduced on the side of Proposition 8 does not exist. It neither acknowledges nor attempts to distinguish the writings of renowned scholars presented at trial in support of Proposition 8, including that of anthropologist Claude Levi-Strauss, history professor Robina Quale and social scientist Kingsley Davis. It ignores the writings of legal giant William Blackstone and philosophers John Locke and Bertrand Russell. It even refused to address the fact that Congress, in the 1996 Defense of Marriage Act, defined marriage as the "legal union between one man and one woman as husband and wife."
3. "The judge also declared,...without reference to the monumental evidence to the contrary, that it is beyond "any doubt that parents' genders are irrelevant to children's developmental outcomes." These assertions appear in the opinion's "findings of fact" section, yet they are not facts. These "findings" derive from arbitrary and capricious non-analysis and are forcefully contradicted by evidence in the court record."