This excerpt from Judge Vaughn Walker's ruling strikes a proper balance, I think:
An initiative measure adopted by the voters deserves great respect. The considered views and opinions of even the most highly qualified scholars and experts seldom outweigh the determinations of the voters. When challenged, however, the voters' determinations must find at least some support in evidence. This is especially so when those determinations enact into law classifications of persons. Conjecture, speculation and fears are not enough. Still less will the moral disapprobation of a group or class of citizens suffice, no matter how large the majority that shares that view. The evidence demonstrated beyond serious recknong that Proposition 8 finds support only in such disapproval. As such, Proposition 8 is beyond the constitutional reach of the voters or their representatives.