If there's anything the Beltway Republicans hate, it's a sudden inopportune eruption of states' rights. First it was drug importation, now gay marriage.
Go back and read/study the founding documents of the United States of America - also what the founding fathers wrote about in letters and journals, etc at that time.
Our "rights" come from, and are granted to "we the people" by our Creator (God) -
Under the republican form of government (this is not a pure democracy), the people select elected representatives to represent and protect their rights and interests for the common good.
"States' rights" my arse.
What about the rights of the majority of the people of California who voted to make Homosexual marriage illegal?