The terms European, Asian, Oriental and Arabic are used to define the geographic region from which we originate, not just where we currently reside. Given cultural developments, they also define our behavioural patterns, ideologies and attitudes. They even define our food preferences.
Some may argue that we are all humans and should not be segregated in this way. Nonsense. We are all different. We all have differences which go to defining us in every way. Denying this is akin to denying that there are different types of apples in this world.