The LGBT community should definitely not be looked down upon. It takes so much courage to come out that, for some people, it's amazing they even come out at all. Gays put everything on the line; friends, family, a home, and much more. So why is it that they are looked down upon? Well, like Rob said, there isn't just one reason. Sometimes it's because of religion. There is a place in the Bible that says homosexuality is wrong (which is arguably misinterpreted), but I think the main reason is because of human nature. Most people think that to propel yourself up, you must push someone else down, therefore some are always looking for a scapegoat, a minority. Gays make up about 20% of the population (at most.) So they are the perfect target, especially since a person's sexuality is something very important to everyone's humanity. Others do it because they themselves are gay and do not want to be gay, so they hate on gays to throw the scent off the gay trail. Take the Westboro Baptist Church, for example. Their whole belief system centers around "God Hates Fags." Literally. I think we all know what's going on there.... anyway, I think it's really good that you question the things you are told instead of just taking them to be the absolute truth. That's the mistake a lot of people make. Hopefully that explained some stuff :)