A racist comment will usually contain a word or phrase that is either a derogatory, offensive, or unfairly stereotypical to a particular race, ethnicity, religion, gender, or sexual orientation.
It is a political and racial slur, intended to deride someone based on race and perceived bias.
The proper spelling is Nazi, from the early 20th century regime in Germany/Deutschland.
Well, I would tell the princable or the super intendent or the counseler. or if that don't work go get together all of the students and right statements about her and then they will fire her :)