Whether it's because of religion, the color of your skin, or any other stupid reason, prejudice is out there.
Prejudicial attitudes leads to hate crimes, segregation, and bias.
Everyone knows about the Jews and how they were forced to go to the concentration camps. Above is a picture of the KKK burning a cross. Hate crimes, however awful they may be, are everywhere. Hate crimes are normally directed at black people, foreigners, homosexuals, bisexuals, and anyone who is different.