It's like i've seen this discussion before... (You're not adding to it. Leave the thread. Yada-yada-yada.) It is redundant. Sorry.
Here's something else to consider: 'Curing homosexuality' doesn't have to involve religion at all. If indeed there is a 'gay gene', then the cure to homosexuality is purely scientific. (Obviously, since religion has not cured homosexuality so far. Praying the gays out? Please.)
To me, the attempt to use religion to cure homosexuality only serves to discount religion as anything meaningful. Not that being an atheist is awesome, since it is relatively empty, but religion is clearly not the answer to all of life's problems.
What religion should do is modernize. They should step up to the plate and fully accept science. Then they can use it to effectively promote their beliefs in the modern society that we live in.
ie. What's better than believing in God? Playing God. If science can be used to determine which fetuses are born gay or not, then why not use it? I think genetic alterations will play a significant role in human development in the very near future. Certainly there are sectors of our society that is already planning on taking advantage of it. I suspect 'the elite' already are. (And we all know what 'the elite' is directly tied to.) And of course genetic alterations could 'cure' many things, not just homosexuality. It can cure all forms of genetic disease. It can also make us more advanced. It's probably the key to human evolution going forward. And it's coming, whether we like it or not. So... Accept, or lose.
Anyway, what's being disregarded in the op is the fact the boy totally agreed to the procedure. He did it by choice. Yeah, you can call it brainwashing. But i call it desperation. He, like millions others before and after him, desperately did not want to be outside the norm. You certainly don't need religion to have that common desire.
There are many progressive theists who support gay marriage and also believe in the value of science. They can't control whether some others who identify as the same denomination do these insane irrational things. Some of the greatest scientists of history believed in God. Albert Einstein for instance.
As for this particular case I don't think it matters that the "patient" agreed to the procedure. There doesn't need to be a demand for a cure to treat being homosexual and it's unfortunate that some view it as an ailment that has to be cured. The guy abused his position of trust and as far as I'm concerned should be sent to jail for something. He misrepresented the facts, he was reckless, and he gambled with the health of the "patient".
The reason why religion doesn't embrace science is quite obvious. To preserve the importance of religion in a person's life they need the masses to continue to be educated and accept what they are being told. As the west has become more urban, industrial and the average levels of education have increased there has been a corresponding decrease in people who identify themselves as affiliated with an organized church.
All that being said I'm content to respect the beliefs of people who believe in God just like how I would expect them to respect my beliefs in areas where they disagree. Let nature take it's course and science show us the facts.