They're not all living on an island together, it's just bars.
I do agree that it shows there is something wrong with society, but I sense that you think it's the opening of gay friendly bars that is the issue, whereas I would say it's the threatening behaviour of some towards gay people.
I don't think you're homophobic but I sense that homosexuality makes you a bit uncomfortable. That's fairly common and I think it's another reason that a gay person might want to 'segregate' themselves from time to time. Not all gay people are the flaming type, most do just want a quiet life which means being more closed about their private life than a straight person would be (how many small talk conversations are "how's the wife", "how's the kids", etc). I wouldn't blame any gay person for wanting an atmosphere where they can let their guard down a little bit.
As an example, I have a female colleague who has adopted kids with her female partner. We were talking about the kids and I said something about her husband and she had to say "well actually...." to correct me. It was clearly awkward for her because she didn't know how I would react and that's the kind of conversation she goes through very regularly. I really don't think it's as simple for gay people as others think it is/should be.