"So some may think that destroying Israel is legitimate and some may think otherwise. Some may think that Israel is an apartheid colonial settler state based on a racist ideology, and some may have a different opinion. There are two sides to the question. Through such a "free exchange of ideas" we will all prosper intellectually. This brings to mind Hannah Arendt's observation, when she visited Germany in 1950, for the first time since she fled the Nazis, that the Germans viewed the extermination of the Jews as a matter of opinion: some said it happened, some said it had not happened. Who could tell? The average German, she wrote, considered this "nihilistic relativism" about the facts as an essential expression of democracy. "
This is the nub of it.