I get the impression that many preachers consider the primary sin being highlighted in Romans 1 is homosexual sex. However, when I look at the way Paul structures his argument it would seem things are otherwise, that the primary sin being highlighted is actually idolatry. This is why the “therefore” is immediately proceeded by:
“For although they knew God, they neither glorified him as God nor gave thanks to him, but their thinking became futile and their foolish hearts were darkened. and exchanged the glory of the immortal God for images made to look like a mortal human being and birds and animals and reptiles.”
Everything else is seen as a consequence of this, as evidence of God’s abandonment. His “giving them over”. That’s the logic of the passage. Which begs the question: why aren’t we focussed more on idolatry, if this is where Paul’s focus was? I have a sneaking suspicion it’s because it would put us in the spotlight more.