Going so far as to call him retarded is ignorant on the other hand. But people need to understand that the way you look and
present yourself will be interpreted by others with only that to judge the big picture from.
Example: I see a guy walking in a black pastic bag and a tinfoil hat. I can be pretty sure he is either crazy or lost a bet.
Am i wrong for making that assumption? No.
TLDR: You WILL be judged by your cover. Its the way the world works.
The trick is to be willing to expand beyond that initial judgment and evolve.