I blame the media.

as soon as their's a death, or a shooting spre, they are like

" it's reported this person has mental illness"

mental illness never seems to be talked about in a good way in the media- and then of course so many people are narrow minded, they'll believe what they here- rather than finding out for themselves

seriously, when have you heard the news announcer say,

" and now the last story of the night is about someone with mental illness who really took the world by storm"

it just doesn't happen, and it's ashame because in reality we're not all that bad