No one is free of prejudice. Women are emotional. Asians are good in math. The systematic subjugation of a social group by anther social group with access to social power. As a form of oppression, racism fits the definition of oppression above.
Racism is different from racial prejudice, hatred, or discrimination.
Racism involves one group having the power to carry out systematic discrimination through the major institutions of society. By this definition, only white people can be racist, because only white people as a group have that power.