In a lot of cases, Christian response to gay marriage can be like Christian response to Hindus burning incense to demons at Hindu temple in a city somewhere. We don't go there, and we don't participate. If I knew I was being invited to a Hindu ceremony that burned incense to other gods, I would imagine I would decline. Indonesia has Muslims and Hindus, but if that isn't your religion, or even if it is, you can just go to the party with food afterward if they invite you to the wedding.
As far as a gay wedding goes, the whole concept is just wrong. I would hope Christians would not attend.
The meme asks a qestion; here are some responses:
"If you don’t attend, you should question calling yourself “Christian” - it seems pretty hypocritical. If we wish to be loved unconditionally - we must also love unconditionally. I cannot imagine abandoning my daughter on her wedding day."
My question for the author of this quote is if you love her, why would you encourage her in sin?
If a parents child marries and just dumps their spouse and decides to marry someone else, and the parents refuse to join in, I respect that also. If a parent doesn't go to a second or 10th wedding of a polygamist child, I can understand that as well.
I read on a forum once about a dispute between an engaged couple where the woman said if they were married, and she were invited to a gay wedding, she would go. The man insisted that she not do so in such a scenario and she would not agree. Engagement makes this a bit more complicated. But there are two issues for the man to face-- a fiancee who says she is a Christian who would go to a so-called gay so-called wedding, and a woman who would not submit to her husband on this issue.
For a young Christian man wanting to marry a woman from western culture, I think that's good as one of many litmus tests he could give her. Would you go to a gay wedding? Of course if she says yes he could discuss it with her. Maybe she needs some discipling. At the least, the two approaches to this issue of how to interact with the world could be quite incompatable. If she thinks 'gay marriage' is okay, something is wrong with her sexual morals and she isn't a good candidate for a Christian to marry. If she wouldn't submit to her husband either, that's another litmus test. A woman could ask a man if he'd go to a gay wedding also. Some people are new believers and repent and submit to the word of God as they are confronted with it, and those people may potentially make acceptable spouses.
Yet another litmus test I could think of could come in the form of a life story of the relative of someone I knew whose husband was trapped on the other side of the Berlin wall and could get out. They were married, and had kids. He divorced her so she could live her life and get remarried because he wasn't finding a way to get out of East Germany. A date who thinks divorce and remarriage is okay in this circumstance, who can't easily be persuaded otherwise is not good marriage material for a Christian, IMO. I think that should be a deal breaker.
"I’ll be walking her down the aisle!!!!"
Isn't giving one's daughter in faux marriage to a woman just as bad as being the faux bride?
As far as scripture goes, Romans 1 in discussing sinful same-sex sexual behavior Paul says their women did that which was against nature. God ordained marriage between a man and a woman in Genesis.
Leviticus says rebuke your neighbor frankly so that you do not share in his sin.