Because…if someone is “gay” (which, in popular lingo, refers to anyone who simply has the feelings) but (1) Doesn’t act on it and (2) Doesn’t condone homosexuality in any way, that person’s only facing a temptation. The temptation may be considered highly unusual, but it is a Temptation, not a Sin. That person, left to his/her own devices and desires, is more prone to homosexual sin, but still has not actually sinned in this way.
Sin is sin, whether natural or unnatural.
By the same token, temptation is temptation, whether natural or unnatural. In either case, a person who is *tempted *cannot be called guilty of the sin the temptation entails…if that were the case, even Jesus would be considered sinful (the scriptures say He was tempted as are we all). Admittedly, to willingly entertain such thoughts would be to commit the sin “in the heart,” but to be battling the desire, but to simply realize it is there, is still merely a temptation.
With regards to the issue of homosexuality, it’s vitally important to separate the temptation from the sin. I for one have grown to be somewhat puzzled that homosexuality is one of the few sins for which even someone who is tempted is accused of being guilty. I’ve a feeling a great many practicing homosexuals, having religious backgrounds, only took the final leap into the actual sin because they felt that they were already sinful in merely being tempted. If we separate sin from temptation, this mistake would be less frequent.