Any sin is relatively as bad as another when compared to the perfection of God. We can repent for these sins, and receive forgiveness from God. The answer to this is simple. Liars, fornicators, adulterers, and thieves do not create organizations whose efforts are solely to promote, mollify, and justify their sins. To compensate for organized gay efforts, Christians have to emphasize that homosexuality is indeed a sin in order to prevent the brain washing of America.
Many gays argue that homosexual sex is justified by genetics.
Whether homosexuality is genetic or not, is not the issue to many Christians. It is an issue of morality, and since Christians use the bible to guide them on the subject of morality, they must conclude that homosexual sex is immoral. At sin.html you can see the major passages from the bible that deal with homosexuality. You will find that it is unquestionable that the bible detests this sodomy. However, lets assume that homosexuality is genetic.