Get the government out of the “marriage” biz! If something is considered sacred, then it is the providence of religion. Churches should have every right to say who can be blessed, who is going to heaven, who is going to hell, what their sacraments are, who can get married, who (if anyone) can get divorced, ad infinitum. If you don’t like it – press for change within your religion, join another one, or drop out altogether.
The state, on the other hand, has a vested interest in certain cultural details such as how children are protected and raised up to become functional members of the society, and how property is distributed when relationships dissolve. If government wishes to confer certain benefits on couples (as the government has the right to define this status), then these benefits should be available to ALL couples so defined.
It is as simple as that. It’ll get sorted out eventually, and I tend to think that it will happen a bit faster than the original civil rights struggle, since most people have homosexual relatives, professional colleagues and close acquaintances.
Oh yeah - The Gropinator - I assume he'll veto that bill.