I choose to ignore that and discriminate against people who do something that is bad for society. To me it is totally irrelevant how natural something is.
Being gay doesn't hurt society, therefore it is wrong to discriminate against gays.
There are many natural things that deserve discrimination and treatment. Either you ignore these things or you have to admitt that it is irrelevant whether someone was born gay.
PS: Blue eyes are definitly ok. Eye diseases not so much, even if you are born with them.
"The first thing Fascists usually try to do is silencing the opposition."