Trump 'Is Acting Like Another Hitler By Inciting Racism," Says Anne Frank's Stepsister

"I think he is acting like another Hitler by inciting racism," said Eva Schloss.

Schloss added, "If Donald Trump became the next president of the U.S. it would be a complete disaster."

This year's theme was "Don't stand by." Schloss noted the theme was "particularly important now with the refugee crisis going on as more people than ever are being bystanders."

Schloss is the daughter of Erich Geirginger and Elfriede Geiringer. Her father died in Auschwitz, and her mother -- who survived -- later remarried to Otto Frank, the father of Anne Frank.

Donald Trump's campaign did not immediately respond to ABC News' request for comment.