>>4123067 (OP)It's because Western Europeans tend to judge people based on their individual characteristics separated from the group and apply agreed universal standards to every human group.
So for example, if a black person robs an store, it's not really because of his race or even the culture he was sorrounded in, but his own choice in his life, according to modern western thought.
This may have been a natural development of individualism, which actually, helped to develop Nationalism as individual peoples were more defined by their ethnic origin rather than his familial origin.
Collectivistic cultures, such as that of the Arabs, are much more clannistic, which makes Nationalism very hard, as Arabs descended from different tribes wouldn't get along very well, thus diminishing any potential of having a more unified human group such as a Nation-State.