The denial of the millennial Jewish link to the Holy Land and the dismissal of the legal basis for the modern Jewish state in United Nations Resolution 181 of 1947 (Arab armies went to war against its Palestinian-Jewish territorial compromise and lost) as a means to argue for the abolition of the Jewish homeland and portray it as an immoral, colonial exercise in theft often flirts with anti-Semitism. It is at its most egregious when it issues from Europeans who seem to have forgotten where the Holocaust was perpetrated. Once in the gas chambers was enough for the Jews.

For Corbyn, who turns 70 this year, misunderstandings or imprecision explain incidents like his description of British Zionists as having “no sense of English irony;” or his inviting to Parliament a Palestinian Islamist who had suggested Jews were absent from the World Trade Center on 9/11 (“I have on occasion appeared on platforms with people whose views I completely reject,” Corbyn says); or his appearance in 2014 at a wreath-laying ceremony in Tunis that appears to have honored Palestinians associated with the 1972 Munich Olympics terrorist attack that killed 11 Israelis.