Racism is a relatively new term addressing an ancient problem. What's the problem? According to the Bible it is a sin problem.
According to secular humanism, which flows hand in glove with the godless Marxist ideology which seeks to exploit this issue, it is a skin problem. A wikipedia article attributes the first recorded mention of the term in Oxford's Dictionary in 1903.
Let's start with how racism is defined today. Dictionary.com says it is "a belief or doctrine that inherent differences among various human racial groups determine cultural or individual achievement, usually involving the idea that one's own race is superior and has the right to dominate others or that a particular racial group is inferior to the others.
Bottom line, making any decision about any person or people group based upon the color of their skin or ethnicity is wrong. Typically the moment anyone says, all whites, all blacks or African-Americans, all Asians, all Jews, all Muslims..... fill in the blank. You are wrong. Why? Because invariably not all fit the description which turns your statement into a half truth and a half truth mixed with untruth is a lie. The brush you used to paint the situation is to big. The inaccurate statement harms or wrongs the individual that does not fit the description. They are maligned. That means evil was spoken of them.
Do you need to identify the racist or racism? Find the one whose speech most frequently refers to color, race or ethnicity in a demeaning or derogatory way.
The Same Problem Existed in the Early Church