Being taught your whole life that you are an evil abomination and that "god hates you" and that you are sick and disgusting is what causes that.
The churches LOVE that stat. What they don't like to tell you is that in places that don't have "fags must die" mentality, that is not the way things are at all. I came out at 35, I was a depressed, hateful, crabby self hating violent jerk.
Then I got a therapist who got it through my head I was NOT SICK! I was healthy, and normal and everyting was alright. Now I LOVE being alive!
From the time you are born in most judeo-christian-moslem homes you are taught that gays are evil, disease ridden child molestors, and that you woud be better of dead than be one. That even thinking like that is a sign of internal evil, and that you have no right to live.
And if you DO come out, especially young, be prepared to have your own FAMILY close the door in your face, to have your friends walk away, to possibly lose your job, or even your place to live. And of course, if you are culturally percevable as gay be ready for anything from attacks from strangers, to vandalism of your property.
With all the s**t that is done to Lesbians and gays usually in the "name of god" they wonder WHY a lot of young people have problems, especially when they first come out???????