When Chris said:
"So the churchgoers correctly say that God's binding of a man and woman should be between a man and a woman, but the government also correctly says that people should be free to have a business contract despite gender. Do you see how they are talking past one another? Both statements are actually correct depending on the definition of the word 'marriage', and that is why the debate never ends."
It reminded me of:
1 Corinthians 9:26 KJV I therefore so run, not as uncertainly; so fight I, not as one that beateth the air:
These people who are uncertain about what the issues actually are expend a lot of furious energy arguing but accomplish absolutely nothing.
If a Christian does not understand the particulars of the issues at hand, fine, just go back to preaching the law and how souls can be saved. Just preach the Bible and don't worry so much about all the worldly nonsense.