She just said that they beat her up just because she was white. No other reason, because she was white. And the fact that they said "Hey Whitey", gives it away that they were prejudice.
Racism is what happened in the '60s. Where people were denied even the most basic things just because of the color of their skin. Sure everyone could be prejudice, but the minorities could not be. They could not tell whites that they couldn't drink at the same water fountains. But whites sure could tell the minorities that they weren't allowed to. A black person could not, deny a white person anything, while a white person could.
If civil rights weren't established, we'd still be in the 60s and I probably wouldn't be doing anything that I'm doing just because I'm a black woman.