File -- In this Thursday, Feb. 14, 2019 photo Poland's Prime Minister Mateusz Morawiecki, left, and Israeli Prime Minister Benjamin Netanyahu, right, attend a meeting in Warsaw, Poland. Poland's prime minister canceled plans for his country to send a delegation to meeting in Jerusalem on Monday after the acting Israeli foreign minister Israel Katz said that Poles "collaborated with the Nazis" and "sucked anti-Semitism from their mothers' milk". (AP Photo/Michael Sohn)