There’s a film called The Lords Of Discipline, which is about a southern military college.
It’s from the point of view of one of the senior students who is told to keep an eye on the first African American student.
He discovers horrendous racism and a secret society dedicated to keeping the college white. He also discovers that many students he considers friends are the worst racists of all.
The point is that had he not been told to keep an eye out he would have been completely unaware of what was going on.