Great questions
Black identity is a relatively new phenomenon. During the 60's in America, during the civil right movement, blacks were discovering that they have to take their perception into their own hands. Prior to this the description of blacks was prescribed by non blacks, so it comes across very derogatory, you have to remember that blacks have not always been recognized as human (which is a horrible fact). In light of this, the black community learned to come together to achieve some common goals and 1st among those goals was respect. So the black identity did transform from negro, to afro-american, to black and then political correctness landed on African American. I can tell you that if African Americans could self identify with countries in Africa they would. Did you know that most Africans consider African Americans to be the same as white people because their heritage is so intermingled?
The African diaspora ranges from a barely noticeable 1% to 100% African genetic heritage, it is society that lumps people of color into this designation that is reffered to as black, and these black communities many of which are centered in urban centers and associated with low income housing and essentially a socialist existence produce a mentality that is often scoffed at by non blacks. Curiously, regardless of skin color if someone grows up in these communities to tend to sound the same and act the same and sometimes look the same. Have you ever heard non blacks refer to each other using urban community colloquialisms?
Funny thing about racial identity, there is no such place as "Blackland" to originate the name. We use the term in our vernacular as it is an accepted remnant of our past and really is also offensive since it does nothing to truly distinguish origin. You mentioned you are Norwegian, you did not describe yourself as "white", it has more to do with being proper and showing respect to your point of origin or your family's point of origin. While the term white may not seem offensive it is the same as calling you out of your name.
I to enjoy Tyrion but don't forget to consider the source as a Lanister his physical appearance was often overlooked because of his power. When you whip a person physically or with insults, dirty looks, or mannerisms that affect you do not trust them, they often become that image. You may be able to ignore a bully, but what we are talking about is not RAISING bullies in the 1st place.