Prejudice exists in all societies.

Most people react differently to people who are different.

Be they a different sex, sexuality, skin tone, eye colour, height, weight, speech pattern, accent, education, political outlook etc.

The irony is that most people appreciate differences most of the time if there is positive role models and access to people who are different.

After all most people find the opposite sex interesting not disgusting.

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A simplistic model for prejudice is:

Unknown creates discomfort to the point of fear.
Fear then creates anger.
Anger boils over to the point someone acts on it.

With exposure to more and more differences most people figure out that different people are interesting. Most people find that they like to eat at an international food court and have a mix of food. Most guys perve on the babe thread and admire the girls of all nations and the girls who are a mix of many nations to.

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One way to combat prejudice:

Library launches 'borrow a person'