I think that's pretty easy. Paul was condemning homosexuals, but JWs believe that not everyone may have the chance to learn "the truth" before the big A. They belive that Big J will read hearts.
The "official" belief is that only the truly wicked will be destroyed. This is the still "the truth" despite TOMO's recent rant about Jeehoober killing inactive JWs and other such nonsense. That raises the question, "Who is wicked and who is ignorant?"
What about the billions with a "B" in China or India who haven't seen a Bible? What about remote tribes who may still practice cannibalism and polygamy? The JW will say, " Jeehoobar will do the judging by reading their hearts!"
That's when you say, " What about little Timmy, who was born with homosexual tendencies, perhaps due to a hormonal imbalance? Then he was raised in a gay-friendly community. He may even have been introduced to homosexual behavior at a young age. Through no fault of his own, ( being subjected to futility by God ) he's a victim of the nature/nurture combo. Will Jesus destroy little Timmy if the Big A comes tomorrow?"
If a God of justice subjects humans to futility, and then destroys them because of the baggage they collect from their sinful condition ( in a world that God ALLOWS the Devil to rule ), how is that just!??
Those are the kinds of questions that I've been asking. My mother has already commented, " I wish your brother ( who is an Elder ) could learn to be compassionate, like you."
DD