@Rockhead,
No, he's just super-sensitive.
If a guy dressed up as a 'broad' or 'hooker' or 'slattern' or 'housewife', I wouldn't take it personally.
I've never dressed as any other race - oh wait - I was a sumo wrestler one year. Won a prize for my home-made costume, too. None of the Japanese I worked with thought anything of it. And I dressed up as one of the docs in the hospital once, too, and he thought it was hilarious. Made me walk around the wards with him for about an hour.
It all gets to be a little too touchy-feely.