What purpose would quoting the Bible to people who don’t accept it serve?
Precisely. I believe in God’s Word but to those who won’t accept it you can say that homosexual acts are a violation of the natural law, of reason. Don’t get your hopes up, of course, for then the typical modern brainwashed by relativism will say:” Natural law accord to whom?” The patron of relativists is Pontius Pilate: “What is truth?”-John 18:38
Personally, I’m tired of this fight. To those who don’t accept that. God said it, that settles it. Proceed at your own peril.