Quite simply, Paul regarded the practice of homosexuality as sin. When we consider the way homosexuals have been treated by our society, it's easy to see why the term homophobia has become popular. Homosexuality has been treated as a unique and seductive form of perversion, and homosexual persons have been excluded and persecuted by a culture that hypocritically glorifies other forms of sexual sin. A society in which heterosexually promiscuous persons become role models has no right to treat homosexuals with such a profound lack of dignity. Paul's words to the Corinthians call upon Christians to treat the homosexual as a person who is in need of forgiveness and transformation, but not to treat him or her differently than those who have fallen victim to other types of sin.
Homosexual practice is sin, but sin is by no means unique to homosexuals.
We are all sinners. Paul reminds the Corinthians that some of them had been delivered from homosexuality, and that raises a vital question. If so, then the biblical prohibitions and even promises of deliverance would seem to make little sense. In order to resolve this issue, it is important that we consider some recent scientific studies. To many, the question is irrelevant.