You're right, Jorge. No evidence exists to support homosexuals are born homosexual. In fact, all the evidence, even evidence from pro-gay researchers (who were forced to admit it) support what you say. All the evidence states environment is the major contributing factor to homosexuality.
I would imagine you've seen the following links on the subject, but for those who haven't:
Unfortunately, many don't really want to know the truth about what is really the major contributing factor behind homosexuality. This Categorical Index of links may prove informative as well.
- Finding a Needle in the Ocean
- Homosexual Researchers Debunk 'Born Gay' Urban Legend FR
- Is Homosexuality Genetic?
- Is Sexual Orientation Fixed at Birth?
- Lust, Violence & Genetics
- Is There a "Gay Gene"?
- The Gay Gene?
- The Biological Research on Homosexuality
- The Fading "Gay Gene"
- The Gay Gene: Going, Going...Gone
- The Innate-Immutable Argument Finds No Basis in Science
- A Change In Thinking
- What Causes Homosexual Desire and Can It Be Changed?
- Facing The Truth About Homosexual Behavior
- What Is "A Homosexual"
- Gender Identity Disorder
- Where Did the Gay Gene Go?
I had some of them but not all.
There's some great material on those sites. Thanks!