Nobody knows what causes homosexuality. The Gay Mafia would LOVE to find some evidence that it is genetic, but given the fact that few homosexuals reproduce, and there is no evidence of homosexual tendencies in the parents or ancestors of gay men, that hope is likely in vain.
The hope for "genetic homosexuality" would be to counter the fact that we are all responsible for our own behavior, regardless of our innate tendencies. If it's voluntary behavior and not genetic, they are engaging in immoral conduct - at least according to basically every religion in the world.
EVERYONE has inclinations to do immoral things, but "we" are responsible for our actions; nobody will accept as an excuse, "I really really really wanted to do that."
Nobody is hated for being homosexual. Nobody is punished or prosecuted for being homosexual, either here or in any foreign country. To the extent that hate and persecution exist, they is the result - often irrational, to be sure - of overt, voluntary actions, even if those actions are affectations and not actual sexual conduct.
Less than 2% of the American male population is "gay." One would never know that by looking at American entertainment or any college campus. The Gay Mafia is wildly successful in peddling a falsely over-stated presence of such people in society.
There is no rational reason on God's green earth why American public schools should be teaching ANYTHING beyond the biological aspects of human reproduction. Teaching about sexual perversion, bizarre quasi-sexual practices, and rare biological anomalies is a crime against the population, and specifically the children and their parents.
It is time for rational Americans to demand an answer to the simple question: On what basis are American Schools teaching about sexual perversion? When were "you" given this mission, and why?
And when no acceptable answer is produced, it should all stop.
FWIW, lesbianism is a whole different matter. There is nothing innate about it (as is the case with homosexuality), and most lesbians are simply women who cannot (or choose not to) relate successfully to men, for any one of a hundred different reasons.
And while we are on the subject, can anyone explain why the phenomenon of gender dysphoria DID NOT EXIST in females 60 years ago, and now we have public high schools in Leftist communities where 25% of the girls claim to be boys? Just wondering.