And yet once again, the same vile racism that led to the Holocaust burbles and blazes right across Europe. Once again Jews (and in an updated twist, the Jewish state) are blamed for just about every evil of the age from the world's economic woes to an al-Qaeda atrocity.
The neo-Nazi football fans of the Ukraine taunt each other with cries of 'Jews!' not because members of the other team are actually Jewish, but because that's about the worst insult they can think to hurl.
The leftie Jew-haters who believe themselves more sophisticated in their sneaking anti-Semitism single out Israel, the Jewish state, as the world's Great Satan. On the right, Jew-hating is fanatical; on the left, it's fashionable.
But right across this spectrum of venom and prejudice runs the old libel - it's all a 'Jew job'.
If you were Jewish in Europe today, knowing all that's gone before and knowing what is always possible again, wouldn't you too be fearful of the writing on the wall?