Being gay is no more a sin than having brown eyes, or being left handed. The Devil is laughing smugly at how well he's manipulated the Christian religion into hating a whole giant group of people. It doesn't even matter if it's a choice or not, but for most gays it is not.
Being attracted to the same sex, having a same sex husband or wife. This doesn't hurt anyone. It often enriches the lives of others. The Bible is a multithousand year document. It has been written and rewritten by men. Entire books have been edited out of it. Imperfect men will eventually corrupt all that they touch. To think the bible is immune to this would be shunning God's own wisdom.
I believe God intends the Bible to give us a general understanding of God's personality, his intentions. Except for the 10 commandments, it was not meant to be a verbatim rule book. In the bible God has told people to murder, to kill women and children! If anything it shows us that God has a unique and different plan for all of us, even the gays. The bible is the light that shows you God's path, but it is not the path itself.
Most of what the bible says about gays is in the Old Testament. It is hanging out right there around completely insane things like. It's a sin to cut your beard! It's a sin to wear two different types of fabric at the same time, and of course, it's a sin to eat pork and shellfish. Funny how we focus on the gay sections here and not the other completely crazy stuff.
The new testament doesn't get into it much, but the biggest passages about it are in Romans and Corinthians. Written by the apostle Paul. Now, it's interesting because the Gospel of the Apostle Barnabas (which was conveniently removed from the bible, but does exist for anyone to go look at online) claims that Paul was deceived and was a traitor. So I think that even if some of the twelve apostles have debate about Christian Doctrine, it is not unreasonable that we do today as well.
Now gays can be sinners. They can have unhealthy and lustful relationships that shy away from God's will... but then, so can straight people.
Even the 10 commands are so very often ignored. Keep the Sabath holy? So if your boss requires you to work Sunday, I hope you're not both going to hell.
Though Shalt Not Lie. Obviously a sin, but one we spend far too little time on if our politics and daily lives are any indication.
Why so often are the very 10 commandments ignored in favor of admonishing gays? Which is no where to be seen in the 10 commandments.