Why is something that obviously should well be evolutionarily wiped out (if it is indeed due to genes/people can't help it) not, by now?
(Corollary question if you say "there is no evolution, it's intelligent design" - ok then what the heck purpose would homosexuality serve in this design? Honest question, I'm not being a smartass.)
Edit - PS you know you're over some kind of target if an OP gets downpoots.
Lust makes it easy, makes it viral, because it's a natural imperative for all; it can only be offset by the spread of morality. Trauma happens, and begets trauma; this also spreads the deviancy and is offset by breaking and treating chains of abuse. And yes, it is also pushed by those with an agenda to destroy family, sanity, and nature - thereby better enslaving humanity. In general, a society with too few real struggles and too many societal ills will make people restless and lack the inspiration for people to bond and mate heterosexually. There is little reason to want to bring kids into such a messed up world, and if you're not doing that, or fighting for a just and substantive cause, you're just screwing around. It's not long before hedonism might as well cross gender boundaries. Homosexuality is a mutation of the human psyche caused by unnatural, immoral contamination of their human environment. It is soul cancer. It starts in the soul's eyes, spreads to the soul's libido, and in Stage IV, metastasizes into the souls of nearby children.