Even if you took the time to explain this to him, using small words and short sentences, maybe with some hand puppets and crayons... He still wouldn't see his own prejudices, wouldn't see that he exemplifies the very traits he claims to find so repulsive in others.
why does anyone give a darn what this ungrateful bastard thinks? Do we need to show him films of “necklaces” back in what he probably considers “the good ol days”?