Al-Husseini opposed all immigration of Jews into Palestine. His numerous letters appealing to various governmental authorities to prevent Jewish emigration to Palestine have been widely republished and cited as documentary evidence of his collaboration with the Nazis and his participative support for their actions. For instance, in June 1943, al-Husseini recommended to the Hungarian minister that it would be better to send the Jewish population of Hungary to the Nazi concentration camps in Poland rather than let them find asylum in Palestine (it is not entirely clear whether al-Husseini was aware of the extermination camps in Poland, e.g. Auschwitz, at this time):