I think you may be on to something. I guessing he is just not used to brown skinned people outside of his behavioral class and doesn't know that we are all the same.
My suggestion is to make sure that he sees the way that you act towards everyone in public. Make sure that he sees you showing compassion towards brown, white, purple, green......
I don't think it will be too hard to change his mind since he thought this up himself and did not learn from anyone in paticular.
Porsche
www.pbnjunk.com