The "IMO" is the real issue here. People doing what is right in their own minds!There are several ways in which people become homosexuals. Most are born with it. It is a physiological condition. They really don't have a choice in the matter. Sure, they could spend there whole life in denial, but that's no way to live. There are also a small percentage of homosexuals that have had years of mental and physical abuse (mostly as a child) that lead them to there sexual confusion. Then there are those who actually choose to be homosexuals. These folks also suffer form a mental disorder often stemming from childhood abuse.
I'm not sure why there are still people out there that will deny scientific fact in the name of their own insecurities. It is really a lead weight in humanities mental evolution.
To tell someone that they are a sinner for being their natural selves is a shameful behavior. IMO, it's more of a sin then the vary act that you accuse.