this is such an interesting thread. I am BRAND new here and although I am not here to debate anything (I am looking to find Christian discipleship and support) I just had to say something after reading all of this.
But first i need to clarify something: when i think of a christian, i think of a person who realizes that they are a sinner, that they need Jesus as a savior, that they have repented of their sins (meaning that they have decided to try and change), that they have accepted God's free gift of salvationthrough Jesus, and that they have made a decision to follow Jesus - his example and his commands, the primary one being to love God and to love each other the way Jesus did... so based on that definition I do not understand the first few comments made in this thread.
When I got saved I was born again but I did not immediately become perfect. I still struggled with alot of bad things in my life, and with the scars, habits, and consequences of my previous mistakes. Now while Jesus helped me through the Holy Spirit to get free of those over time, this was a long process, with many slip-ups along the way.
I personally have known alot of people who are good Christians but who struggle with homosexuality. They KNOW that it is a sin and so they do not practice it (they do not have relationships, they are single and celibat) and these people identify themselves as being gay christians. Maybe this is a vocabulary problem, or a problem with how we identify others.
But I know that just because a person has a feeling or a desire for something, that is not the sin itself. We are called to overcome temptation - but being tempted itself is not a sin. It is what you DO about it, and whether you have given control of your mind and thoughts over to God or not, that really counts. But these things take time, it is a process, and I think that we need to be gentle, patient, and understanding with the new christians who struggle with their sinful desires, no matter what they are.
At the end of the day, only God knows the heart, and only he knows the intentions and spirit of a person. He is the only one who can judge whether an individual belongs to him - we can't. We can look attheir life and tell them that their actions and choices do not reflect that they are walking with God, but as to if they are christians or saved or not, we can't. For all we know they are backsliding or just went through a trauma, we just can't know. That's why we shouldn't judge - because we just CANT know inside a person.
As far as whether or not a person can be actively participating in a homosexual relationship (such as a marriage) where sexual activity is ongoing, and still call themselves a Christian, that is a different situation. I think that the physical act of sodomy itself is a sin, and so continuing in that is not God's best will for anyone. Not stopping and repenting is not repenting, and that will naturally create a spiritual boundary between that person and God. I would say that a Christian in such a situation is either backsliding or is in denial about what God wants & expects from them. However, as we cannot know which situation it is, we should be open and not judgemental. After all, God loves us all and is always working in a person's life to break through those barriers, whether they are backsliding or just in denial.
But we are ALL sinners (even Christians) and no sin is greater than another, and homosexuality is NOT the unpardinable sin. So we need to be patient, forgiving and loving with each other, because love is the only cure for sin, and love is the only catalyst for truly changing. Judging never brought anyone into the kingdom in my opinion, so if we are going to condemn sin we need to be careful to still love the sinner.
just my opinion. thanks.