Please, don't say you want to kill people. That's just taking it way too far... You're worth more than the label people put on you, they only go by what they see. They don't know you. Become a good person, anyways.
But, I ask myself this everyday. I don't know why people are so cruel, but for some reason having an odor makes people hate you. I have encountered some of the nicest people in the world and sometimes I wonder what makes them so tolerable and how much better the world would be if everyone behaved this way.
To be honest, I'm a perfectly healthy human being. There is no reason for me to obsessed over a disorder just because it offends people. But unfortunately, the social aspect of human interaction is important. It affects everything, so the best thing you can do is just smile and be nice.