Germany’s chancellor Angela Merkel stated in 2018 that “when the generation that survived the war is no longer here, we’ll find out whether we have learned from history.” As a Polish Jew born in 1925, who survived the Warsaw ghetto, lost my family in the Holocaust, served in a special operations unit of the Polish underground, the Home Army, and fought in the Warsaw uprising of 1944, I know what it means to be at the sharp end of European history – and I fear that the battle to draw the right lessons from that time is in danger of...