The big argument in California against Proposition 8 seems to be "It's not a moral issue, it's a civil issue." Yesterday I read an interesting argument against Proposition 8. In the argument, the author is trying to refute the claim that adoption agencies will be forced to adopt babies to same-sex couples. He uses an interesting comment. He says, "California already has on its books (and has for several years) laws granting domestic partners (homosexual and heterosexual) the same civil rights as married couples."
If "domestic partners" have the same civil rights in California, than why the big buzz about Proposition 8 taking away civil rights from homosexual couples? It seems to me (due to the comment above) that Proposition 8 is definitely a moral issue and not a civil issue at all.