I used to think that way, too. But I now realize that the U.S. Supreme Court has decided that all this stuff is a federal matter, and they will impose their will; let there be no doubt about it.
And this stuff will work its way up to SCOTUS, so the best thing to do, IMO, is to "cut 'em off at the pass" with a Marriage Amendment.
It's sad that we have to do it, but I don't see any other way. The enemies of tradition and family are using every tactic they know to tear down everything that is good.