Show me ten elected Republicans who are for same-sex marriage. Go on, try it.
Okay.
Dick Cheney (former vice president and United States representative)
Ileana Ros-Lehtinen (Florida US representative)
Arnold Schwarzenegger (former governor of California)
Gary Johnson (former governor of New Mexico and current Libertarian nominee for President)
Christine Whitman (former governor of New Jersey)
Phill Scott (Republican Lt. Governor of Vermont)
Ron Paul (representative for Texas - believes it is up to the states to decide. Personal belief is marriage is between man/woman, but won't support or deny anything regarding LGBT issues)
Mitt Romney (former Massachusetts governor and current Republican presidential nominee. Supports same-sex couples getting domestic partner rights, but not marriage)
Steve Litzow and
Cheryl Pflug (Washington state senators)
Wayne Gilchrest (former US senator for Maryland)
You can argue that Romney and Paul don't count, since they don't support
marriage, but they at least support rights or won't play personal politics in Paul's case.
I won't disagree that Republicans are strongly against same-sex marriage, where only 28% support it nationally [1]. Republicans are also more religious than Democrats and Independents with 50% going to church at least once a week, whereas 20-25% of Democrats and Independents attend church regularly. [2] I think this plays a huge role in supporting gay marriage. If you're a regular church go-er, you're less likely to support it when the religion you adhere to doesn't support or allow it.
The problem isn't a Republican or Democratic one, however. New Hampshire showed that Republicans can support gay marriage strongly, while North Carolina showed they can't. There are all sorts of factors playing into each vote in each state and I personally support each state's decision, whether to allow or not allow it. People in NC obviously have different views than people in NH and states should have the right to vote how their constituents and people want. You may not like the results of some votes, but that's where the checks and balances of our government come into play and allow challenges to these votes to start.
I think the only way the issue will ever be settled is with a Supreme Court opinion on the matter for the entire country. That kind of undermines the state rights point I made, but I think we will be in an endless cycle of votes passing or failing and nothing substantial being decided until the Supreme Court makes a decision. It's the same thing that happened with civil rights. Nothing was changing or happening until the Supreme Court gave an opinion and even then people fought it, but couldn't stop it.
For full disclosure, I am a straight Christian Republican voter with gay relatives & friends and I am
not against gay marriage. All the discussion on whether gay marriage ruins the sanctity of marriage is silly to me when Kim Kardashian can marry a guy for a week just to make $70 million from advertisers, then divorce him. I think children will grow up how they grow up and if they are in a loving and supportive environment, they will become loving and supportive and a responsible member of society whether or not they are raised by a gay couple or a straight couple. I don't see gay marriage as destroying the institution, but instead strengthening it if the couples are committed to each other for life like marriage is meant to be.
References:
[1]
https://www.gallup.com/poll/147662/first-time-majority-americans-favor-legal-gay-marriage.aspx
[2]
https://www.gallup.com/poll/118937/republican-base-heavily-white-conservative-religious.aspx