The teaching of 'otherism'

The Black Lives Matter movement in the US has drawn attention to uncomfortable questions for nations across the world. — AP

THE Black Lives Matter movement in the US has not only triggered global outrage, it has also drawn attention to uncomfortable questions for nations across the world.

It begs the question: how does the average citizen become so exclusionary and parochial when it comes to identity and outlook on the "self" and the "other"?