Cheng nakes a weak case for impuning biblical authority without which theological anarchy results. The " God is still Speaking" philosophy encourages " anything goes" as long as the claim that love is the prime mover in the activity.
The harsh reality is that the Bible labels same gender sex as sin.
Nevertheless, "literalists" have no right to dictate to the rest of society; especially when their own dictates may weaken civil rights or equality in any form. We literalists have to mind our own business and worry about our own salvation and gently spread the Gospels to a fallen world.
Our faith is illogical, supernatural, irrational and unprovable founded on a document that is supernatural, illogical, irrational and unprovable ; but is God's plan of salvation.