Is Naturalism Opposed to Homosexuality?

In my latest Come Reason e-Newsletter, I just finished a three-part article on the problems with homosexual marriage. The last installment prompted this response by a good friend of the ministry:

It seems that the homosexual has no real world to live in. As far as
worldviews go, neither theism nor atheistic views account for homosexuality.
The naturalists rely on the principle of "survival of the fittest" to
assist in supporting their evolutionary view. If, for the sake of argument
naturalism was true, the homosexual would have been sifted out of existence (first, do to the inability to procreate and secondly do to the short life expectancy among male homosexuals). This is just some fodder for further thought.
D.L.DeAguiar

Although I think that homosexuality could possibly be explained by Darwinists today, it can never be argued that this predisposition will advance the species. If homosexuals are evolutionists, then arguing that "they're born that way" doesn't help advance their cause.

Of course, I haven't seen the benefit in that argument no matter what they believe. Even if one were to grant that homosexuals are born with that proclivity, it doesn't prove that we should therefore embrace it. Bipolar disorder, for example, has a genetic component. Alcoholism can also be attributed in specific cases to a genetic predisposition. Does this mean we should accept it? Or does it mean that these with such a predisposition need to take more care and work harder to avoid the pitfalls of their genetics? A little clear thinking in this area will go a long way in our talk with others about this subject.