How about something I will comprehend? You haven't managed to do that in your response.
I am not religious. I am not atheist. I am not agnostic. I don't care if God exists, or Zeus, or Vishnu, or Atius Tirawa, or any other deity.
So, for this non-religious person's sake, explain how religious people can't talk about "right and wrong". How do non-religious people define "right and wrong"? Is something "right" because the law says it is OK? Are all illegal activities "wrong"? I mention the law because if you don't use a church's definition of "right and wrong" do you use the government's definition instead?
As for marriage having nothing to do with a man and a woman, only with two people in love, how do you explain the marriages of royalty that ended wars between European countries not so long ago? Those marriages weren't valid in your eyes because they weren't for love?