Tim Keller in this current Redeemer Report finally voiced his take on Homosexuality, in a more public manner.
His take is impressive as always. Perhaps Keller is better a writer.
When dealing with challenges against Christians on "they pick and choose which of the rules in the Bible to obey", Keller easily defended the case that the accusation is invalid as the rules that weren't followed in the OT were replaced by the person of Christ, such as sacrifices, rituals, etc. And that what still remain in the NT are obviously ignored by the accusers.
Keller mentioned that Jesus' mentioning of marital union of one man and one woman is clear enough to judge any other types of union as sexual imorality.
Keller continued...The case of Nation-State in the old Israel time makes sins severe penalties. The New Testament dealing of sins is exemplified by Christ, through exhortations and exclusion from membership.