> You apparently don't know a lot about homosexuality.

What in the parent comment makes you think this way (besides being an awful way to introduce an opinion)? He's just stating that someone with homophobic parents will probably be discouraged to explore, accept, or even recognize his sexual orientation. More broadly, that environmental factors will play a role.

And yes, I guess it's not more malleable than any other sexual orientation. It could happen to heterosexual children in an heterophobic society, too.