It's not that the number is going up – it is that people are feeling safe to reveal how they really feel. There have always been gay people – just like there are gay animals.
Look, I am straight. I see a pretty girl, and I feel attracted to her. But if I see a guy, even a handsome male model or something, I can recognize they are handsome, but I just don't feel anything for them, romantically. I am not attracted to them, and I could not change this about myself.
Gay people go through horrible pressure to change this part of themselves. It leads to high rates of suicide, depression, broken families, the spreading of sexual disease from shameful, quick encounters, and other terrible things. Now, in some places, they are starting to be told that it's ok to be themselves, that they can be happy with the way they were born, and they don't have to feel less than human, and they don't have to fear for their safety.
The last article is particularly good, i think. The reason I included links to these Gay Muslim organizations and topics is to show that this is not just a western or a secular phenomenom; it is something that is happening around the world, and it has been happening for as long as history goes back.
Yeah, being a minority is difficult. Being a double minority even worse. British gay muslims have to deal with discrimination because of their religion and their sexuality. Consider also that their religion considers homosexuality to be an abomination, then I can imagine that they struggle quite a bit, just as do many Christian gays. It must be difficult to be told that the god you worship hates you.