Twin love is so strong. It is said that twin are nearly like the same. That is their genetic make up is same. So you are the one to stand for your brother. If someone is gay that does not make him less of a human. I can understand how few years back they used to face isolation. But these days it is better. As days go by people start getting used to such. Even thus days we have the human rights standing for the LGBTQ community. Never desert your brother just because of the decision he has made. If that is who he is everybody should respect that. There is no need to start pointing fingers. Your parents died when both of you were young. He has been acting both figures. You should never desert him for anything in the world. Even if other relatives are against his decisions. You should stand with him whatever the situation.