[Captain.Remy]

People dislike them because for some, "being normal" is being heterosexual, nothing else. The notion of "normal" doesn't exist properly and loads of people don't understand that.
In societies, people used to see heterosexual couples and for them, that is normal, so everything which does change is unnaceptable. The same thing happened with black or arabian people and does happen nowadays too.
Our generation, young people accept that because we are in that culture, being tolerant is really important today as our societies see changes.