Prejudice and in combination with any form of discrimination in a disaster for human kind. None of reasonable & capable human beings thought's & speeches is immune from harboring prejudice! It often will take deliberating efforts and also awareness to eliminate any form of prejudice; with the right and (G-D-ly) sufficient motivation, it could be dealt with it! The right information & education is a powerful weapon against prejudice! It is a way also to expose the root causes prejudice, enable to examine the attitudes more objectively, or the pride in that specific person or group associate with the same issue and/or thoughts! It could be a way to help certain victims of prejudice in a more wisely and tactfully way!

Prejudice is a form of discrimination that its roots have from mostly pride! It causes people to distort, or even ignore the facts that is in conflict with their predetermined opinions, without any knowledge of the facts; but just by assuming! Prejudice may have its beginning in seemingly innocent, but it is misguided; with a wrong mentality, without a real reason, but more in a different way of (wrong) opinions. It may be sown by those who deliberately promote warped or miss-understanding, not having the willingness even to try to understand views of other races, cultures, religions, denominational differences! It is evil 'product' of inordinate pride!

A [self-confident] 'fool' has no delight in understanding but only in revealing his personal opinions {and} himself. (Proverbs 18:2)

This even can develop racial biases, in a very young age in children, when they pick up from the wrong attitudes; words of dislike; hate and gestures of others! The word of G-D is calling these people even 'fools'! He who walks [as a companion] with wise men is wise, but he who associates with [self-confident] fools is [a fool himself and] shall smart for it. (Proverbs 13:20 Amp.)

It is not only the 'black' and 'white' issue's; it happen among all kind of different groups of people, who are different from each other. It is the willingness to have an understanding or even respect for others or other kind of people and their way of living, expressions, customs, or way of speaking. Any preconceived opinion or feeling, whether positive or negative; An irrational hostile attitude, fear and hatred towards a particular one, like example with different accents;

It is also a sense of patriotically national consciousness exalting one nation above others; looking down and placing primary emphases on promotion of its own culture and interest as opposed to those of nations and origins! Nationalism and extreme patriotically feelings or opinions divides humanity into mutually intolerantly. Many of these kind of issues that we are facing today are finding their roots in results of false attitudes, extreme patriotically; unreasonable prejudice; pride; arrogances and eve rude. The majority that support in some way prejudice; injustices; adverse judgment's and opinions formed beforehand; without any knowledge (or not having the willingness) of the facts or circumstances; racism fosters, such as people's systematic denial of rights to fellow humans, are very painfully evidence's that racism and  prejudice rests on falsehoods and pre-judge-mentalities. The damage caused by such hatred is devastating! 

...For the Lord sees not as man sees; for man looks on the outward appearance, but the Lord looks on the heart! (1 Samuel 16:7b Amp)

...But the wisdom that is from above is first pure, then peaceable, gentle, and easy to be in treated, full of mercy and good fruits, without partiality, and without hypocrisy. (James 3:17 KJV)

...Everyone proud {and} arrogant in heart is disgusting, hateful, {and} exceedingly offensive to the Lord; be assured [I pledge it] they will not go unpunished. (Proverbs 16:5)

The man who is characterized by G-D-fearing (Solomon) wisdom will be pure, peaceable, etc