The question alone ought to be enough to give Evangelicals pause. Admittedly, the authors reserve "homophobia" for fear of homosexuals and not merely dislike and disapproval.
A link to the article:
Is Homophobia associated with homosexual arousal?
In making homosexuality and disapproval of homosexuality such a strong part of who and what they are, homosexuality is presented as the strongest form of rebellion and repudiation of evangelical Christianity. Further, the suspicion arises of why should being gay be such an issue for these people. Are they hiding something? Do they engage in private orgies? Do they need homosexuals so that they will feel themselves sufficiently Christian by having people to look down on? The latter is suspiciously similar to the well known Christian vice of pride.