- Ruth Ben-Ghiat: Mitt Romney accused Donald Trump of creating 'trickle-down' racism. She says history offers many examples
- She says Trump's bigotry emboldens racists. She was victim of a surge of anti-Semitic slurs on Twitter
Ruth Ben-Ghiat is a professor of history and Italian studies at New York University. Her latest book is "Italian Fascism's Empire Cinema." The opinions expressed in this commentary are solely those of the author.
(CNN)How do people become racists? How is bigotry spread and sustained in society? Mitt Romney's comments that Donald Trump's election could legitimize "trickle-down" racism in America make us think twice about these questions.