Also worth noting is the rosy description of your gay relative living in Jerusalem, which portrays someone living a selfless life of service to Christ. How dare we judge him!
While judgment belongs to God, to praise someone when you do not know the whole story is an uninformed "judgment" at best, and, at worst, a clever attempt to manipulate the discussion by asserting that the person is admirable and "good" - and thus we must not question the morality of his behavior.
I have also lived and ministered in Jerusalem, very imperfectly I must add. The leader of one ministry I worked with eventually destroyed his family as he finally "came out" and acknowledged his homosexuality.
For years this man's ministry and family were portrayed in laudatory terms; few suspected the real truth.
"Man looks on the outward appearance, but God looks on the heart."
As for me, I render unto Caesar the things that are Caesar’s and unto God the things that are God’s....just like I was instructed to do by Jesus through the words of Matthew...
Recall that you are a sinner and fall short of the glory of God as has every single human being since Adam, outside of Jesus Christ himself. The sins of some are greater in the eyes of man than others, and some sin is abomination, but break God's law in any manner and break it all. None are worthy, all require forgiveness.
Take care not to cast a stumbling block before your brother, here. Revulsion over the sin extending into the rejection of a repentant sinner is clearly wrong.