I guess non-christians have no problem seeing that being gay is just an aspect of human diversity and how we are created. In this age of Google it really take just little effort to learn about this issue.
For most of us, we have no control over our sexual orientation. I remember as a young man in elementary school the first time I found a woman attractive my reaction was both electric and involuntary. The attraction was just present; I could not delay it until a later time even if I wanted to.
For me, this raises the issue why would God create gay persons when their same sex attraction would probably last their entire lifetime? Why does God not answer prayers to “pray the gayness away”? I thought this might be his way of saying to us: “Don’t call my creations sinful. They are also my beloved children.”
If this is so, then we should not quote the gay condemning Bible verses, but this one:
“Which of you, if your son asks for bread, will give him a stone? Or if he asks for a fish, will give him a snake? If you, then, though you are evil, know how to give good gifts to your children, how much more will your Father in heaven give good gifts to those who ask him! So in everything, do to others what you would have them do to you, for this sums up the Law and the Prophets.” (Matthew 7:9-12)
Our Father’s gifts are abundant. If the gay people asked for the gift of marriage would our Father grant it? After all, if we ask them not to marry, then they are entitled to turn around and demand us not to marry as well. If we cannot abide by their demand, then they cannot abide by our demand.
Being gay is not a sin. Laws must be equal, and burdens must be equal.