I'll say two things:
1. This ruling is yet another example of right-wing "lies" and "fear-mongering" come to pass. The reason many people opposed to gay marriage also oppose civil unions is because they figured it wouldn't be seen as a compromise, it would be used to push the gay marriage agenda. Bullshit, they argued. Well, the narrow ruling argued that very premise. They said it was unconstitutional for a state to allow civil unions but withhold the title "marriage", and of course gay marriage supporters rejoice. But as I've said before, it's not fear-mongering if it's also the truth, and it's not a lie just because it hasn't happened yet.
I've read the ruling and that was not the basis of the ruling. The basis of the ruling was that same-sex couples had a right to Civil Marriage in California prior to the enactment of Prop 8 and that there was no rational reason for the government (i.e. the initiative process acting to create law) to revoke a right already held by a group. The reason was that all rights and responsibilities associated under California law existed under Civil Unions (which would be the status of same-sex couples if Prop 8 was to pass) so that all the arguments made by proponents were false - the only reason to pass Prop 8 was established as removing equal treatment under the law by calling the legal relationships the same thing.
http://www.ca9.uscourts.gov/datastore/general/2012/02/07/1016696com.pdf
Sooo, then it was the basis of the ruling. You just added in their rationale for it. That doesn't change the fact that they used the fact that CA has domestic partnerships as part of their reasoning to strike down Prop 8.
Also, I'll point out that this "right" they had was granted by judicial fiat; it didn't "always exist". The 9C tried to do some quarterbacking (and I guess some people have fallen for it), but the court doesn't have the final say over what the constitution says. The people are the ultimate sovereign, and it's clear they never intended for their constitution to reflect a right to gay marriage (given the popular votes on Proposition 22, which was struck down, then Prop 8).
Good.
Well, first of all the problem is gay marriage supporters have the mistaken belief that they have room to sit around demanding answers for not getting their way. It's one of the reasons I like to stress that gay marriage -- this thing they want so badly -- hasn't ever existed. Nobody's taking anything away from you. This country didn't just wake up one day thirty years ago and decide, "gays can no longer marry". The onus is those who want to change marriage, not those who want it to stay the same. It'd be great if both sides had "compelling reasons" the other side could respect, but alas that isn't the case.
Infertile heterosexual couples are an exception to the general rule that male/female couples procreate and same-sex couples do not. You're comparing the rule in one case to the exception in another and calling it the same thing.
Personally, I'll say I've never been convinced of the gay marriage arguments, either. Because there are certain legal benefits tied to marriage doesn't entitle you to them, and those benefits exist due to the specific relationship between men and woman, and not the general human tendency to pair up.
How are they being denied equal protection of the law? What are, say, straight people protected from that gay people aren't being protected from, just because they're gay?
None of the Civil Marriage laws are written in terms of sexual orientation, the discrimination is written in terms of gender.
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So if the law says marriage is a man and woman, meaning a woman can only marry a man, and a man can only marry a woman, who's being discriminated against? Some men might would marry a man, some women might would marry a woman, but neither of them can.
That seems equal to me.