In this atmosphere of post-traumatic gloom, Avraham Burg, a former Speaker of the Knesset, managed to inflame the Israeli public (left, right, and center) with little more than an interview in the liberal daily Ha’aretz, promoting his recent book, “Defeating Hitler.” Short of being Prime Minister, Burg could not be higher in the Zionist establishment. His father was a Cabinet minister for nearly four decades, serving under Prime Ministers from David Ben-Gurion to Shimon Peres. In addition to a decade-long career in the Knesset, including four years as Speaker, Burg had also been leader of the World Zionist Organization and the Jewish Agency for Israel. And yet he did not obey the commands of pedigree. “Defeating Hitler” and an earlier book, “God Is Back,” are, in combination, a despairing look at the Israeli condition. Burg warns that an increasingly large and ardent sector of Israeli society disdains political democracy. He describes the country in its current state as Holocaust-obsessed, militaristic, xenophobic, and, like Germany in the nineteen-thirties, vulnerable to an extremist minority.