Everyone needs to repent and try to change. It's just not our job to make them do it. All we can do is carry the Word and witness to the best of our abilities. How many Christians have actually changed their inner self? We try to do better, but most of us still have most of our original faults and have to go back and repent again and again. We shouldn't foster their lifestyle but we also shouldn't condemn them for it.
I think we get so hung up on the fact that God called the sodomites an abomination that we forget that the wages of ALL sin is death. But for the sacrifice of Jesus on the Cross, we would all be as condemned as the sodomites.
You do not allow Molech in with HIS rules and laws just because you 'love' him.