What if an editorial writer uses strong language to describe a person?

This is a difficult question to answer, as editorial writers have more leeway in using figurative language than, say, a reporter writing a straight news story. If an editorial writer describes a very tough school board member as a Nazi and it is clear from the story that the writer uses the term to describe their arbitrary and tough personality rather than actual membership in the Nazi party, the writer may have a defense to a defamation claim.