Comparing the word disordered to the word nigger is a hell of a jump, especially considering that the medical community did not sit around trying to think up words that offend you. Your explanation does indeed give me some insight on why you are offended, but again my only point was that the actual word disorder was not cooked up to insult, belittle or chastise a person of your irregular condition.
In the history of the world, I highly doubt that calling someone disordered as a way of insulting them has ever happened during a heated argument. I'm more than willing to call you whatever you wish to be called, but I'm sorry, you have not proven to me that there is any malice whatsoever in a merely descriptive word assigned by the scientific medical community.