Am I a bad person if I am not acting about my brothers issue?

I live in an Arabic country where the traditions and old habits are still dominating people’s minds and where the culture is different from any other one.
I have two brothers who are 19 years old(twins), they are still in school.My parents found out that my brothers are gays so my dad has hitted them and kicked them out of the house. In my country they spit on the gays and laugh on the way they get dressed. I am not against the idea but I am not doing anything to get them back. Now they are living in a hotel, they quitted going to school and started work.My parents don’t want them anymore and they are telling people that their boys are dead. My sister and me are trying to convince my dad but wihtout any progress. Even my brothers don’t want to return at home.
I know that in your country it’s the right of the person to live alone when he’s 18 and being a gay is a normal thing but look to the facts in our way of thinking and ask me if I am wrong about not acting in this situation.
Thank you