The report came out last month from the Christian research organization The Barna Group, which partners with prominent Christian organizations like Church Communication Network, EMI Christian Music Group, and Tyndale House Publishers. The Barna Group has recently released a book titled unChristian which documents the declining reputation of Christianity among young Americans (16- to 29-year-olds).
In particular, I'd like to draw your attention to the following paragraph which appears in an online summary of the book unChristian:
Interestingly, the study discovered a new image that has steadily grown in prominence over the last decade. Today, the most common perception is that present-day Christianity is "anti-homosexual." Overall, 91% of young non-Christians and 80% of young churchgoers say this phrase describes Christianity. As the research probed this perception, non-Christians and Christians explained that beyond their recognition that Christians oppose homosexuality, they believe that Christians show excessive contempt and unloving attitudes towards gays and lesbians. One of the most frequent criticisms of young Christians was that they believe the church has made homosexuality a "bigger sin" than anything else. Moreover, they claim that the church has not helped them apply the biblical teaching on homosexuality to their friendships with gays and lesbians.Granted, I don't have a copy of the full report, so I know nothing about the Barna group's sampling methodology or statistical analysis. But this finding was thought-provoking nonetheless.
You can read more about the Barna report at the Box Turtle Bulletin or the Christian Post.
Hat tip: my boyfriend