Can I say something here? I am local, but I am polite most of the time. I've seen some white dudes are not gentlemen too. They don't hold for the doors too. I nod and greeting when people say morning to me. I give my seat to those needed people while i am on the bus or train. I do say thanks if people give me a hand.
Actually, it depends on what kind of environment they are growing up. For example, if poeple have well educated, they wont act like that. Not their faults, its GOV'T...