The word is hard to find for the latest news out of Poland, which is inviting world leaders to mark the 80th anniversary of the liberation of Auschwitz-Birkenau, the labor and death camp where more than one million people perished, something like nine in ten of them Jews. All are welcome, except for — wait for it — the elected leader of the Jewish state, who is instead threatened with arrest if he steps foot on Polish soil to pay homage to those who perished.