My thoughts on the matter are firstly, kudos to the (straight) conservatives that have found a way to be on the right side, despite their religious convictions. I've been holding off this thread to see what the other side on the issue would say but I guess no-one is biting.
Personally, I like that one party is supporting gay marriage and another not since it continues to be an extremely divisive issue in this country. On a practical level, it would be strange not to have that view unrepresented given that 74% of Republicans still believe that gay marriage is morally wrong, which I believe, as Christians, you all do - you're just putting freedom/liberty above your morality here. The country as a whole is just tipped over to 50% supporting GM this year, down from last year, the first time it ever went over 50%, at 53%. So there's still a way to go regardless of political affiliation. More importantly on this point, that it is even a presidential-level issue is progress.
[stats source: Gallup 5/12]
As a social conservative, one should be the bulwark against too fast a social change and stand for tradition; against civil rights, against women's rights (src), and now against gay rights. It's part of the job description to argue vigorously on the issue and resist until the tipping point.
In this case whether the government's role in guiding morality, which is all the issue boils down to ultimately, stands afore; whereas in the civil rights issues it was the superiority of whites, and in women's rights the superiority of men (src). And as each pillar is knocked down, the country gets back together and pretend it never happened.
I believe that the pillar needs to be brought down strongly, otherwise it would be too easy to re-erect. Hence issues such as abortion is only one SCOTUS vote away from being made illegal all over again and is a continuous issue. By the same token, rolling back civil rights is nigh impossible at this stage, not least of which it is a settled issue as far as nearly all Americans are concerned (I can't even find a survey about it and 'equal rights' now means women's rights).
Within the party, the social conservatives are still a large voting bloc, even to the point that groups such as GOProud still cannot be represented. Even GOProud's statement of support of Romney puts that " jobs, the economy, healthcare, retirement security and taxes are all ‘gay issues,’ and on every single one of those issues, Mitt Romney is light years better than President Obama." (src) despite, presumably, knowing that Romney is wholly against gay marriage and homosexuality altogether - perhaps, they are just GINO's (Gay in name only)? It may just another one of those strange powers the Republican party has to make people vote against their self interest, but until GOProud can have a seat at the table without the hate-groups within stalking out, I can't see a change.
In case you didn't know SCOTUS has been asked to rule on DOMA (src):
So maybe this is where it needs to end up to hammer the point of the separation of church & state but also on government interference.
WASHINGTON -- The Obama administration is asking the Supreme Court to settle the legal fight over a law that denies federal benefits to married gay couples.The Justice Department on Tuesday asked the court to hear an appeal in its next term of lower court rulings striking down a portion of the Defense of Marriage Act. The earliest the justices might decide to hear the case is in late September. Arguments probably would take place over the winter and a decision returned by late June 2013.The administration said it agrees with the lower court rulings, but wants prompt high court review because President Barack Obama has instructed federal agencies to continue to enforce the law's ban on federal benefits to married gay couples until there is a final court ruling.
Quickly onto the points in the OP:
1: Homosexual marriage does NOTHING to the sanctity of marriage between straight people
:This is really side-stepping the issue as to whether it is the government's role to interfere with moral issues - I don't know if you're pro-choice or pro-life but both are moral issues that stand together in my mind.Trying to use the force of law against homosexuals and homosexuality is incompatible to the concepts of freedom and liberty
: This is the strongest argument I think that can cut a swath from end-to-end of the party form libertarians for sure, through the Christian blocs to the right-of-centers and independents. For this to really take hold though, the Christian bloc, likely the largest and most powerful opponents, needs to figure out a practical way to ignore the religious issue since it will be seen, and is, a further erosion of religious power.There are many homosexuals / bisexuals that would vote Republican were it not for the gay issue that Republicans have
: As a Democrat, if I could vote, I say the Republicans should keep providing the choice quotes that the rest of us find amusing. It's sad to see the Romney move towards the right on the issue but that's his job now I suppose.
It was powerful to see Obama coming out on the side of gay marriage and the immediate effect it had on the minds of many. I think it signals another plank in his coming campaign and his second term, should he win. Maybe you Republicans should vote for him this year, if you feel strongly enough on this issue -- Romney will at best do nothing but he could end up unwinding DADT or worse re-enforce DOMA.