"I'm not racist; I have a black friend! So there." I bet if those people you've spent so much time helping, heard you using a word that describes their problems to call someone "stupid", they wouldn't be too pleased. Basically what you're saying is, "Baldwin, you're as stupid as the mentally handicapped people I help."
FYI: the only to groups who I am charitable with are animals (dogs in particular) and the mentally hadicapped. Those are the only two groups I actually donate money to and/or activaly participate in some sort of charitable event (back when I was fat I went to an event and dressed up as Santa Clause for children that were in pshcyatric care, and I also collected cloths for them... most of the time these kids are taken from their parents with force, and have nothing with them but the clothes on their back. I have also donated money to the Hungarian Special Olympics team. So there. That'll help fine tune your ball park of my attitude on those less fortunate then me. In addition, I am still trying to make Baldwin look like a human being ;)