From a Christian: the word "natural" is so often mis-used in this debate, in my opinion. I do think that homosexuality is a sin - and my plain reason for that is that I believe from the evidence, explanations and its effect on my own life that the Bible is the Word of God. However, in a sinful world, homosexuality is natural (although imperfect if you understand the distinction). I mean, come on, some people are NATURALLY allured that way. Comes down to definition and it's so vague.
As for the topic question, I wouldn't, no. Having same-sex attraction is something that is a wrong part of human nature, but trying to change a person to become straight is DEFINITELY NOT the right way forward to deal with it. Cleaning the person in ANY sin before the transforming work of salvation is not the way the Bible teaches. Don't get me wrong - we can say what's right and what's wrong. But Jesus came for the sick and not for the well. (Luke 5:31)