PREJUDICE
Prejudice means "judging before" you have the facts. Never judge till after you have the facts. Nothing is so utterly devoid of reason as a passionate hatred of any race or class. All men are much the same when you come to know them. Class or race faults are superficial. The human qualities strike deep.—Dr. Frank Crane.
A prejudice is a conviction not shared by you.
"Do you like codfish?"
"No, I don't like codfish, and I'm glad I don't like it, because if I liked it I'd eat it, and I hate the damn stuff."