Follow up question: if a repentant homosexual is saved and his sins are forgiven by God, then is it appropriate for other Christians to judge him based upon past sins that God has already forgiven?
(N B: if your answer to the previous question was that he is beyond saving, then please disregard this question)
I do not believe that any is "beyond saving" for Jesus. The Bible also warns us to watch against wolves in sheep's clothing (Matthew 7:15), false teachers (2 Peter 2: 1-3), and those who would alter God's Word (Revelation 22:18-19).