In To Kill a Mockingbird, what are some examples in which fear and racism overpowered reason and intelligence?

BOB
EWELL'S ACCUSATION.  The most
obvious example comes when Bob Ewell accuses Tom Robinson of raping his daughter,
Mayella. Bob's hatred of Negroes is even greater than his dislike of nearly everyone
else.

THE
LYNCH PARTY.  The otherwise
upright citizens who attempted to get past Atticus at the jail allowed their fear of Tom
to override their good senses. Luckily, Scout's words of wisdom brought them back to
reality.

BOB
EWELL STALKS.  Tom's death
wasn't enough for Bob. He felt the impulse to stalk and frighten Tom's wife, Helen, as
well.

DOLPHUS
RAYMOND.  Raymond's decision to spend his wife with
Maycomb's Negroes makes the rest of Maycomb's white community think he is mentally
unstable and/or a drunk.