There is a big difference between accepting gays and approve of it. It reminds me of an ep of South Park Mr. Garrison try to get fire by doing lots of inappropriate gay things and nobody would do anything. Finally Mr Garrison got so fed up saying there is a big difference between tolerance and liking something, saying "just because you tolerate it, doesn't mean u have to like it" and it is gay, doesn't make it Ok to do inappropriate thing like shuffling a ruler up another man's ass in class.
This is something lots of Americans today, don't understand, those who disapprove of gays, usually don't even understand, right and wrong is determine base on whether u cause harm to others, society, state or international community and to make it worse, despite claiming to be holy, Christianity is invented under a culture that doesn't understand it either and due to their hate against gay, they put those hate speech into the bible, saying gay=evil and there is a bunch of idiots today, still follow the teaching of that f***ed up book.
Many of those who are pro-gays, aren't any better and are almost as bad as the people in that South Park episode, accepting any gay behavior as appropriate, even stuffing a ruler up another gay man's ass in a class full of fourth graders and see any condemnation of such inappropriate behavior as homophobic. For example, in real life, there are a series of Youtube video of lesbian kissing random girls on beaches, some, qualify as sexual assault, because it is a forced kiss, so youtube took it down and as a result, there are pro-gays accusing Youtube as homophobic, as if sexual assault is Ok if it is gay!!! If u don't approve of the "gay, not choice" slogan there will be pro-gays accusing of homophobic and attacking u, which is nonsense, sexual attraction is a state of mine, I am sexual attracted to Emma Watson and want to have sex with her, but if I am brain dead, will my body still be sexually attracted to her? Psychology have proved, with enough understanding all state of mind can be changed, via counseling, medicine or surgery, it is just matter of time till we know how to turn any straight person gay and any gay person turn straight at will. Thus, at most we can say "gay, not choice" for now, because there isn't enough understanding.
Having said that, most older generation, even if they know one should repect and tolerate gay behavior, because they are not hurting anybody, it doesn't mean they approved it, this include many gays themself