Polish Prime Minister Mateusz Morawiecki is pulling out of a summit with Israel after its prime minister suggested that Polish people conspired with the Nazis during World War II. Poland has shown razor-thin skin when it comes to comments linking the nation or its people with the Holocaust, passing a law last year that made such public utterances illegal. But ahead of the meeting, hosted by Israel for the Visegrad Group countries - Czech Republic, Hungary, Poland and Slovakia - Israeli Prime Minister Benjamin Netanyahu said, "Poles co-operated with the Germans" during the Holocaust.