I'm sorry you had to run into that idiot. But listen....everyone just about has something rotten they have to deal with sometime in their life...unfair things, idiotic people, you name it. It's just one of those things. You know who you are, who your family is. That's the important thing. I grew up mostly in the Seattle area. (a port city) I was accustomed to being with people of all kinds of races and wasn't raised to base my opinions on people based on skin color. My family wasn't that way at all. I couldn't care less what someone's skin color is. It's what they believe in, what they do that matters. Sometimes there's a group of like people who band together and do rotten things. Sometimes not. But anyhow, remember...those that mind don't matter. Those that matter don't mind. My mother use to tell me, when I was having some kind of "beat down" from someone about something, "remember who you are and what you stand for." I think that's a good thing to keep uppermost in your mind. And all the other B.S. will just roll right off you.
I am caucasion, but have very olive complexion and I get VERY dark in the summer....more so when I was younger. I love having skin that is tough and doesn't tend to burn except maybe the first time out in the sun for the season if I stay out too long. LOL. My son also gets so dark that people ask him if he is Mexican. LOL. He doesn't have features that are Mexican...it's just that he gets so tan easily.
There are all kinds of mixtures of races and nationalities in America. Maybe in England (that's where you are, right?) they don't have as long a history of having such a melting pot of races and nationalities there and so aren't use to it. (not that this doesn't happen in America, but maybe even within America, there are tendencies...for example: port cities have always had more people from other countries and continents coming and going so seeing people of various ethnic backgrounds is more usual to people there than say, from more isolated, smaller towns etc.
Anyhow, I don't agree with these quota rules, where they have to accept a certain number of some particular race. I don't believe in government interference with stuff like that from a political standpoint. I think reverse discrimination is equally wrong and it is getting to be very prevelent, in some cases it's over shadowed or upstaged "regular" discrimination.
I know, from your posts that you come from a hard working, upper class family, that you're educated, strive hard for achievement as your family has, so I don't believe for one minute that you were accepted based on your color. You earned your place. I think that dumb jerk who said that to you was basing his words on ignornace of who you are and he was incredibly rude. But if it isn't one thing in life, it will be another. You're the better person, so try to slog through the best you can, don't get bogged down by idiots and you'll come out on top.