1. Marriage is a civil right granted by the government.
2. Everyone should have the same civil rights under the law, regardless of their sexual orientation.
3. Same-sex marriage hasn't been recognized in every state, so it is not settled.
4. Same-sex marriage has come to symbolize the greater struggle for acceptance and legal equality for LGBT people. It raises the basic question of whether it's OK to treat people differently because of the sexual orientation and whether being gay is wrong/a choice. So, the fight for SSM has advanced acceptance and equality for gay people across the board.
5. The US still has tons of homophobia and mistreatment of gay people so we have a lot of work to do in general to make acceptance of homosexuality a social norm. We've come a lot way in the past 10 years, but there are still anti-gay hate crimes, conversion therapy and bullying of gay kids going on. We can't accept second-class citizen status on any issue or be complacent even when we've had some political success in recent years. As if it's OK to be homophobic or legally discriminated against in some states. It's never OK and we shouldn't have to take it any longer.
I have a reasonable counter here.
1. Marriage and the family was instituted before the concept of human government. Thus goes beyond civil rights. (Look at Genesis 2-4 on this)
2. Those who want to change that are trying to undermine cultural and societal norms that have always existed. Thus the burden of proof to change roughly the whole of human history is on the ones trying to change that incontrovertible fact.
3. The Founders to a man agreed with the Biblical view of marriage and family life and shouldn't we at least consider the wisdom of the founders even if many of you want to cast off the Bible and its role in American jurisprudence.
4. For the courts to undermine the will of the people specifically expressed through their legislatures or through voter referendum to codify traditional marriage as the only acceptable marriage in said state is a stain on the very courts themselves
5. The state's who had bans on SSM who had them overturned by federal courts (yes I'm looking at you too California and Prop 
should have said bans restored and all said "unions" voided from the state records at minimum.
That's nonsense.
You're wrong for two basic reasons.
One, we have a secular government and a secular Constitution. What a specific religion has to say about marriage law is irrelevant.
Two, "we can never change anything!" is a horrible argument. Marriage law was not static for all of human history. Women used to be treated like chattel. We used to have child marriage, polygamy, dowry, dower, no divorce and arranged marriages. All that has changed and evolved throughout history because society has changed and progressed.
This is an issue of the shifting of what is an accepted fact. At one point in America, it was an accepted fact that black people were inferior and deserving of slavery. It was an accepted fact that women could never be full citizens with equal rights. Eventually, opinions changed based on a continued national discussion.
This same process happened with homosexuality. There has been a national discussion on homosexuality, especially since the 1960s. My side has won the underlying argument here, since most Americans acknowledge:
1. Homosexuality is not a choice.
2. Homosexuality is not immoral or harmful to society.
If you oppose same-sex marriage, you have to convince people on those underlying points. Because, if you concede those two points, opposing same-sex marriage is nonsensical.
You gave yourself away with point five, jack law. Retribution is a nasty thing.
Shut up snow, you're biased. This thread is for straights, trying to tell you what's right.
