Uppity is a word spat in condescension. When someone wants to feel superior to another, they call them uppity. There's no such thing as "uppity". It's an artificial definition used by people who feel threatened and insecure.
I've heard and seen the word applied to all sorts of situations. Mostly to blacks and whites, hardly ever Mexicans or hispanics. It does seem to occur when discussing certain races.
In America, its a joke now and its a term not applied to any particular ethnicity. Lots of people use the word "uppity".
By posting this I only wanted to know if it was true that many are insecure with themselves or not. I always feel that extreme pride in oneself is due to insecurity, because I have experienced it myself and know what it feels like. When I see an eastern euro or any other prideful, smug, or person with a superiority complex that is withdrawn I know that they feel insecure in some way because they are really afraid they are inferior and are losers. When a person who really is intelligent has an ego that spins out of control and all of the sudden they believe they are a genius, there will be some insecurity because deep down inside the person really is aware that they are not a genius and they can't deal with it. They may treat other people like they are below them, and automatically assume people are idiots when they are not because of their insecurity just to convince themselves they're a genius. Usually very competitive people who want to impress other people are like this, because they feel they have to be on top of everyone else. They may even appear weak and shy, but deep down inside they want to have all the power. I admit, I suffer from this and it is truly a disease, but it is pretty easy for me to pick out someone with an inferiority complex because of it.