That's shitty prejudice but it isn't like this person has systemically rigged a system in favor of her race for hundreds of years. Trying to compare a ching chong remark with slavery, Black Codes, Segregation, Jim Crow, housing discrimination, job discrimination, police demographic profiling, and disproportionate sentencing is inherently racist. You are trying to justify the systemic oppression of a racial group over a distasteful slur.