As a former geneticist I think I should clarify about the incest and potential deleterious outcomes of such pairings. While there is a slight increase in risk factor of certain recessive diseases, there is also what is termed "coupling up" of the good genes. Remember that cousin x cousin pairings is legal. There have been numerous studies involving quails that have shown the birds seek out their cousin for matings, and this has now been shown in numerous other species - close enough to double up on the good genes, but far enough away to (hopefully) prevent recessive diseases raising their heads.
I cannot be bothered to troll through all the postings. The author's statement seems to lack logic and clarity. Society's notion of what is right and wrong is fluid. In the Ancient world homosexuality was widely practiced and accepted. Throughout the dark, middle and enlightened eras homosexuality was barred and outlawed. We have now moved on (or backwards, which ever way you want to look at it) as a society. To echo other posts, homosexuality cannot be viewed in the same context as paedophilia - in gay relationships, they are consensual; in paedophilia they are not, and often with massive longterm consequences on the part of the abused. We as a society have dictated that this is wrong. We have made the distinction.
As for whether homosexuality is a choice or something you are born as - well in 2012 it is both. There is an underlying genetic coding to who we find attractive - this is often due to the MHC (google to find out more). Numerous studies have shown that men who have identified themselves as gay, and who have approved necropsy studies to be performed on them when they decease, have revealed that the majority of these men have certain areas of the brain that are more similar to the brain of a woman. Why is this the case is still under scrunity, it's possible high levels of estrogen during gravity could be the cause/one of the causes. However, it is a choice. A man/woman sexually attracted to ppl of their own sex (whether that is gay or bisexual) have a choice to act upon that. They may chose to be openly gay, or indeed to get married and live a heterosexual life style. That is their CHOICE.
I shall direct your attention to a new set of studies published this week, that has revealed (although there are some limitation to their studies) that people behind anti-gay policies, and theories, are themselves likely to be holding repressed gay feelings. These papers are published in Journal of Personality and Social Psychology.
This is scientific fact. I wish people who are interest in any topic, whether pro or against, read the facts, become educated and then make an informed judgement...otherwise you all just look like uneducated baboons.