Our society is ableist. Naming everything quickly and without thought a disability isn't wise and will most probably lead to discrimination because people are ignorant. Stuttering is considered a disability in SOME countries, in others it doesn't. Calling it a disability isn't right because it has to do with the severity. For someone that can't utter a single word, yes it is, but foe those with lighter stutters it isn't. Same way a lisp isn't a disability. I don't consider stuttering a disability, unless you are basically unable to utter a single word.