Historian’s trial widens Europe’s divide over acceptable limits to free expression

LONDON — When the world’s best-known Holocaust denier goes on trial in Vienna today, he will have some surprising defenders: his most outspoken opponents.

Six years ago, British historian David Irving launched a libel suit in London against a historian whose books accused him of being one of the world’s leading defenders of Hitler’s regime. Deborah Lipstadt’s works showed that Mr. Irving, a biographer of Hitler and a renowned scholar of the Nazi era, was a defender of the Nazi dictator and a denier of the mechanized killing of six million Jews under Hitler’s orders.