There are many books, many temples in India which depicts existence and acceptance of homosexuality.
Read more: http://en.wikipedia.org/wiki/Hinduism_and_sexual_o...
But in current time it is not at all accepted and we are way behind on being open about it.
I would rather ask the question, when did it get label as mental disorder !
Someone had come from somewhere and say that ohh this is not right lets ban it, and everyone said, ooh this is a good idea, lets call it a mental disorder.
Well such opinions should be not imposed on anyone.